CVE-2026-6474

Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve portions of server memory, via crafted timezone zones. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve portions of server memory, via crafted timezone zones. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

PostgreSQL is a powerful, open source object-relational database system that uses and extends the SQL language combined with many features that safely store and scale the most complicated data workloads. This package provides the essential shared library for any PostgreSQL client program or interface.

Security Fix(es):

Missing authorization in PostgreSQL CREATE TYPE allows an object creator to hijack other queries that use search_path to find user-defined types, including extension-defined types. That is to say, the victim will execute arbitrary SQL functions of the attacker's choice. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6472)

Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds. This may execute arbitrary code as the operating system user running the database. In applications that pass gigabyte-scale user inputs to the relevant database functions, the application input provider may achieve a segmentation fault. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6473)

Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve portions of server memory, via crafted timezone zones. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6474)

Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to overwrite local files, e.g. /var/lib/postgres/.bashrc, that hijack the operating system account. It will remain the case that starting the server after these commands implicitly trusts the origin superuser, due to features like shared_preload_libraries. Hence, the attack has practical implications only if one takes relevant action between these commands and server start, like moving the files to a different VM or snapshotting the VM. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6475)

Use of inherently dangerous function PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(), lo_read(), lo_lseek64(), and lo_tell64() functions allows the server superuser to overwrite a client stack buffer with an arbitrarily-large response. Like gets(), PQfn(..., result_is_int=0, ...) stores arbitrary-length, server-determined data into a buffer of unspecified size. Because both the \lo_export command in psql and pg_dump call lo_read(), the server superuser can overwrite pg_dump or psql stack memory. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6477)

Covert timing channel in comparison of MD5-hashed password in PostgreSQL authentication allows an attacker to recover user credentials sufficient to authenticate. This does not affect scram-sha-256 passwords, the default in all supported releases. However, current databases may have MD5-hashed passwords originating in upgrades from PostgreSQL 13 or earlier. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6478)

Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AF_UNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6479)

Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system user running the database. A distinct attack is possible if the application declares a user-controlled column as a "refint" cascade primary key and facilitates user-controlled updates to that column. In that case, a SQL injection allows a primary key update value provider to execute arbitrary SQL as the…

PostgreSQL is a powerful, open source object-relational database system that uses and extends the SQL language combined with many features that safely store and scale the most complicated data workloads. This package provides the essential shared library for any PostgreSQL client program or interface.

Security Fix(es):

Missing authorization in PostgreSQL CREATE TYPE allows an object creator to hijack other queries that use search_path to find user-defined types, including extension-defined types. That is to say, the victim will execute arbitrary SQL functions of the attacker's choice. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6472)

Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds. This may execute arbitrary code as the operating system user running the database. In applications that pass gigabyte-scale user inputs to the relevant database functions, the application input provider may achieve a segmentation fault. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6473)

Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve portions of server memory, via crafted timezone zones. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6474)

Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to overwrite local files, e.g. /var/lib/postgres/.bashrc, that hijack the operating system account. It will remain the case that starting the server after these commands implicitly trusts the origin superuser, due to features like shared_preload_libraries. Hence, the attack has practical implications only if one takes relevant action between these commands and server start, like moving the files to a different VM or snapshotting the VM. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6475)

Use of inherently dangerous function PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(), lo_read(), lo_lseek64(), and lo_tell64() functions allows the server superuser to overwrite a client stack buffer with an arbitrarily-large response. Like gets(), PQfn(..., result_is_int=0, ...) stores arbitrary-length, server-determined data into a buffer of unspecified size. Because both the \lo_export command in psql and pg_dump call lo_read(), the server superuser can overwrite pg_dump or psql stack memory. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6477)

Covert timing channel in comparison of MD5-hashed password in PostgreSQL authentication allows an attacker to recover user credentials sufficient to authenticate. This does not affect scram-sha-256 passwords, the default in all supported releases. However, current databases may have MD5-hashed passwords originating in upgrades from PostgreSQL 13 or earlier. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6478)

Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AF_UNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6479)

Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system user running the database. A distinct attack is possible if the application declares a user-controlled column as a "refint" cascade primary key and facilitates user-controlled updates to that column. In that case, a SQL injection allows a primary key update value provider to execute arbitrary SQL as the…

PostgreSQL is an advanced Object-Relational database management system (DBMS). The base postgresql package contains the client programs that you'll need to access a PostgreSQL DBMS server, as well as HTML documentation for the whole system. These client programs can be located on the same machine as the PostgreSQL server, or on a remote machine that accesses a PostgreSQL server over a network connection. The PostgreSQL server can be found in the postgresql-server sub-package.

Security Fix(es):

Missing authorization in PostgreSQL CREATE TYPE allows an object creator to hijack other queries that use search_path to find user-defined types, including extension-defined types. That is to say, the victim will execute arbitrary SQL functions of the attacker's choice. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6472)

Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds. This may execute arbitrary code as the operating system user running the database. In applications that pass gigabyte-scale user inputs to the relevant database functions, the application input provider may achieve a segmentation fault. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6473)

Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve portions of server memory, via crafted timezone zones. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6474)

Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to overwrite local files, e.g. /var/lib/postgres/.bashrc, that hijack the operating system account. It will remain the case that starting the server after these commands implicitly trusts the origin superuser, due to features like shared_preload_libraries. Hence, the attack has practical implications only if one takes relevant action between these commands and server start, like moving the files to a different VM or snapshotting the VM. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6475)

Use of inherently dangerous function PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(), lo_read(), lo_lseek64(), and lo_tell64() functions allows the server superuser to overwrite a client stack buffer with an arbitrarily-large response. Like gets(), PQfn(..., result_is_int=0, ...) stores arbitrary-length, server-determined data into a buffer of unspecified size. Because both the \lo_export command in psql and pg_dump call lo_read(), the server superuser can overwrite pg_dump or psql stack memory. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6477)

Covert timing channel in comparison of MD5-hashed password in PostgreSQL authentication allows an attacker to recover user credentials sufficient to authenticate. This does not affect scram-sha-256 passwords, the default in all supported releases. However, current databases may have MD5-hashed passwords originating in upgrades from PostgreSQL 13 or earlier. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6478)

Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AF_UNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6479)

Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system user running the database. A distinct attack is possible if the application declares a user-controlled column as a "refint"…

PostgreSQL is an advanced Object-Relational database management system (DBMS). The base postgresql package contains the client programs that you'll need to access a PostgreSQL DBMS server, as well as HTML documentation for the whole system. These client programs can be located on the same machine as the PostgreSQL server, or on a remote machine that accesses a PostgreSQL server over a network connection. The PostgreSQL server can be found in the postgresql-server sub-package.

Security Fix(es):

Missing authorization in PostgreSQL CREATE TYPE allows an object creator to hijack other queries that use search_path to find user-defined types, including extension-defined types. That is to say, the victim will execute arbitrary SQL functions of the attacker's choice. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6472)

Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds. This may execute arbitrary code as the operating system user running the database. In applications that pass gigabyte-scale user inputs to the relevant database functions, the application input provider may achieve a segmentation fault. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6473)

Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve portions of server memory, via crafted timezone zones. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6474)

Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to overwrite local files, e.g. /var/lib/postgres/.bashrc, that hijack the operating system account. It will remain the case that starting the server after these commands implicitly trusts the origin superuser, due to features like shared_preload_libraries. Hence, the attack has practical implications only if one takes relevant action between these commands and server start, like moving the files to a different VM or snapshotting the VM. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6475)

Use of inherently dangerous function PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(), lo_read(), lo_lseek64(), and lo_tell64() functions allows the server superuser to overwrite a client stack buffer with an arbitrarily-large response. Like gets(), PQfn(..., result_is_int=0, ...) stores arbitrary-length, server-determined data into a buffer of unspecified size. Because both the \lo_export command in psql and pg_dump call lo_read(), the server superuser can overwrite pg_dump or psql stack memory. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6477)

Covert timing channel in comparison of MD5-hashed password in PostgreSQL authentication allows an attacker to recover user credentials sufficient to authenticate. This does not affect scram-sha-256 passwords, the default in all supported releases. However, current databases may have MD5-hashed passwords originating in upgrades from PostgreSQL 13 or earlier. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6478)

Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AF_UNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6479)

Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system user running the database. A distinct attack is possible if the application declares a user-controlled column as a "refint"…

PostgreSQL client programs

Security Fix(es):

Missing authorization in PostgreSQL CREATE TYPE allows an object creator to hijack other queries that use search_path to find user-defined types, including extension-defined types. That is to say, the victim will execute arbitrary SQL functions of the attacker's choice. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6472)

Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds. This may execute arbitrary code as the operating system user running the database. In applications that pass gigabyte-scale user inputs to the relevant database functions, the application input provider may achieve a segmentation fault. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6473)

Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve portions of server memory, via crafted timezone zones. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6474)

Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to overwrite local files, e.g. /var/lib/postgres/.bashrc, that hijack the operating system account. It will remain the case that starting the server after these commands implicitly trusts the origin superuser, due to features like shared_preload_libraries. Hence, the attack has practical implications only if one takes relevant action between these commands and server start, like moving the files to a different VM or snapshotting the VM. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6475)

SQL injection in PostgreSQL pg_createsubscriber allows an attacker with pg_create_subscription rights to execute arbitrary SQL as a superuser. The attack takes effect when pg_createsubscriber next runs. Within major versions 17 and 18, minor versions before PostgreSQL 18.4 and 17.10 are affected. Versions before PostgreSQL 17 are unaffected.(CVE-2026-6476)

Use of inherently dangerous function PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(), lo_read(), lo_lseek64(), and lo_tell64() functions allows the server superuser to overwrite a client stack buffer with an arbitrarily-large response. Like gets(), PQfn(..., result_is_int=0, ...) stores arbitrary-length, server-determined data into a buffer of unspecified size. Because both the \lo_export command in psql and pg_dump call lo_read(), the server superuser can overwrite pg_dump or psql stack memory. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6477)

Covert timing channel in comparison of MD5-hashed password in PostgreSQL authentication allows an attacker to recover user credentials sufficient to authenticate. This does not affect scram-sha-256 passwords, the default in all supported releases. However, current databases may have MD5-hashed passwords originating in upgrades from PostgreSQL 13 or earlier. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6478)

Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AF_UNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6479)

Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system user running the database. A distinct attack is possible if the application declares a user-controlled column as a "refint" cascade primary key and facilitates user-controlled updates to that column. In that case, a SQL…

PostgreSQL is an advanced Object-Relational database management system (DBMS). The base postgresql package contains the client programs that you'll need to access a PostgreSQL DBMS server, as well as HTML documentation for the whole system. These client programs can be located on the same machine as the PostgreSQL server, or on a remote machine that accesses a PostgreSQL server over a network connection. The PostgreSQL server can be found in the postgresql-server sub-package.

Security Fix(es):

Missing authorization in PostgreSQL CREATE TYPE allows an object creator to hijack other queries that use search_path to find user-defined types, including extension-defined types. That is to say, the victim will execute arbitrary SQL functions of the attacker's choice. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6472)

Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds. This may execute arbitrary code as the operating system user running the database. In applications that pass gigabyte-scale user inputs to the relevant database functions, the application input provider may achieve a segmentation fault. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6473)

Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve portions of server memory, via crafted timezone zones. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6474)

Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to overwrite local files, e.g. /var/lib/postgres/.bashrc, that hijack the operating system account. It will remain the case that starting the server after these commands implicitly trusts the origin superuser, due to features like shared_preload_libraries. Hence, the attack has practical implications only if one takes relevant action between these commands and server start, like moving the files to a different VM or snapshotting the VM. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6475)

Use of inherently dangerous function PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(), lo_read(), lo_lseek64(), and lo_tell64() functions allows the server superuser to overwrite a client stack buffer with an arbitrarily-large response. Like gets(), PQfn(..., result_is_int=0, ...) stores arbitrary-length, server-determined data into a buffer of unspecified size. Because both the \lo_export command in psql and pg_dump call lo_read(), the server superuser can overwrite pg_dump or psql stack memory. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6477)

Covert timing channel in comparison of MD5-hashed password in PostgreSQL authentication allows an attacker to recover user credentials sufficient to authenticate. This does not affect scram-sha-256 passwords, the default in all supported releases. However, current databases may have MD5-hashed passwords originating in upgrades from PostgreSQL 13 or earlier. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6478)

Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AF_UNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6479)

Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system user running the database. A distinct attack is possible if the application declares a user-controlled column as a "refint"…

PostgreSQL is a powerful, open source object-relational database system that uses and extends the SQL language combined with many features that safely store and scale the most complicated data workloads. This package provides the essential shared library for any PostgreSQL client program or interface.

Security Fix(es):

Missing authorization in PostgreSQL CREATE TYPE allows an object creator to hijack other queries that use search_path to find user-defined types, including extension-defined types. That is to say, the victim will execute arbitrary SQL functions of the attacker's choice. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6472)

Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds. This may execute arbitrary code as the operating system user running the database. In applications that pass gigabyte-scale user inputs to the relevant database functions, the application input provider may achieve a segmentation fault. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6473)

Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve portions of server memory, via crafted timezone zones. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6474)

Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to overwrite local files, e.g. /var/lib/postgres/.bashrc, that hijack the operating system account. It will remain the case that starting the server after these commands implicitly trusts the origin superuser, due to features like shared_preload_libraries. Hence, the attack has practical implications only if one takes relevant action between these commands and server start, like moving the files to a different VM or snapshotting the VM. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6475)

Use of inherently dangerous function PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(), lo_read(), lo_lseek64(), and lo_tell64() functions allows the server superuser to overwrite a client stack buffer with an arbitrarily-large response. Like gets(), PQfn(..., result_is_int=0, ...) stores arbitrary-length, server-determined data into a buffer of unspecified size. Because both the \lo_export command in psql and pg_dump call lo_read(), the server superuser can overwrite pg_dump or psql stack memory. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6477)

Covert timing channel in comparison of MD5-hashed password in PostgreSQL authentication allows an attacker to recover user credentials sufficient to authenticate. This does not affect scram-sha-256 passwords, the default in all supported releases. However, current databases may have MD5-hashed passwords originating in upgrades from PostgreSQL 13 or earlier. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6478)

Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AF_UNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.(CVE-2026-6479)

Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system user running the database. A distinct attack is possible if the application declares a user-controlled column as a "refint" cascade primary key and facilitates user-controlled updates to that column. In that case, a SQL injection allows a primary key update value provider to execute arbitrary SQL as the…

Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve portions of server memory, via crafted timezone zones. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

PostgreSQL is an advanced object-relational database management system (DBMS).

Security Fix(es):

• postgresql: PostgreSQL: Credential recovery via covert timing channel in MD5 password comparison (CVE-2026-6478)
• postgresql: integer overflow can cause an undersized allocation and an out-of-bounds write (CVE-2026-6473)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

PostgreSQL is an advanced object-relational database management system (DBMS).

Security Fix(es):

• postgresql: PostgreSQL: Operating system account hijack via symlink following in pg_basebackup and pg_rewind (CVE-2026-6475)
• postgresql: PostgreSQL libpq: Buffer overflow allows server superuser to overwrite client stack memory (CVE-2026-6477)
• postgresql: PostgreSQL: Credential recovery via covert timing channel in MD5 password comparison (CVE-2026-6478)
• postgresql: integer overflow can cause an undersized allocation and an out-of-bounds write (CVE-2026-6473)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

PostgreSQL is an advanced object-relational database management system (DBMS).

Security Fix(es):

• postgresql: PostgreSQL: Operating system account hijack via symlink following in pg_basebackup and pg_rewind (CVE-2026-6475)
• postgresql: PostgreSQL libpq: Buffer overflow allows server superuser to overwrite client stack memory (CVE-2026-6477)
• postgresql: PostgreSQL: Credential recovery via covert timing channel in MD5 password comparison (CVE-2026-6478)
• postgresql: integer overflow can cause an undersized allocation and an out-of-bounds write (CVE-2026-6473)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

PostgreSQL is an advanced Object-Relational database management system (DBMS). The base postgresql package contains the client programs that you'll need to access a PostgreSQL DBMS server, as well as HTML documentation for the whole system. These client programs can be located on the same machine as the PostgreSQL server, or on a remote machine that accesses a PostgreSQL server over a network connection. The PostgreSQL server can be found in the postgresql-server sub-package.

Security Fix(es):

• postgresql: PostgreSQL: Operating system account hijack via symlink following in pg_basebackup and pg_rewind (CVE-2026-6475)
• postgresql: PostgreSQL libpq: Buffer overflow allows server superuser to overwrite client stack memory (CVE-2026-6477)
• postgresql: PostgreSQL: Credential recovery via covert timing channel in MD5 password comparison (CVE-2026-6478)
• postgresql: integer overflow can cause an undersized allocation and an out-of-bounds write (CVE-2026-6473)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

PostgreSQL is an advanced Object-Relational database management system (DBMS). The base postgresql package contains the client programs that you'll need to access a PostgreSQL DBMS server, as well as HTML documentation for the whole system. These client programs can be located on the same machine as the PostgreSQL server, or on a remote machine that accesses a PostgreSQL server over a network connection. The PostgreSQL server can be found in the postgresql-server sub-package.

Security Fix(es):

• postgresql: PostgreSQL: Operating system account hijack via symlink following in pg_basebackup and pg_rewind (CVE-2026-6475)
• postgresql: PostgreSQL libpq: Buffer overflow allows server superuser to overwrite client stack memory (CVE-2026-6477)
• postgresql: PostgreSQL: Credential recovery via covert timing channel in MD5 password comparison (CVE-2026-6478)
• postgresql: integer overflow can cause an undersized allocation and an out-of-bounds write (CVE-2026-6473)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

PostgreSQL is an advanced object-relational database management system (DBMS).

Security Fix(es):

• postgresql: PostgreSQL: Operating system account hijack via symlink following in pg_basebackup and pg_rewind (CVE-2026-6475)
• postgresql: PostgreSQL libpq: Buffer overflow allows server superuser to overwrite client stack memory (CVE-2026-6477)
• postgresql: PostgreSQL: Credential recovery via covert timing channel in MD5 password comparison (CVE-2026-6478)
• postgresql: integer overflow can cause an undersized allocation and an out-of-bounds write (CVE-2026-6473)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

PostgreSQL is an advanced object-relational database management system (DBMS).

Security Fix(es):

• postgresql: PostgreSQL: Credential recovery via covert timing channel in MD5 password comparison (CVE-2026-6478)
• postgresql: integer overflow can cause an undersized allocation and an out-of-bounds write (CVE-2026-6473)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve portions of server memory, via crafted timezone zones. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve portions of server memory, via crafted timezone zones. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

• SECURITY UPDATE: integer wraparound on 32-bit systems in palloc() callers
  • debian/patches/CVE-2026-6473.patch: integer wraparound on 32-bit systems in palloc() callers
  • CVE-2026-6473
• SECURITY UPDATE: format-string memory disclosure in timeofday() via crafted timezones
  • debian/patches/CVE-2026-6474.patch: format-string memory disclosure in timeofday() via crafted timezones
  • CVE-2026-6474
• SECURITY UPDATE: path traversal in pg_rewind allows origin superuser to overwrite local files
  • debian/patches/CVE-2026-6475.patch: path traversal in pg_rewind allows origin superuser to overwrite local files
  • CVE-2026-6475
• SECURITY UPDATE: stack buffer overrun in libpq PQfn() (lo_read/lo_lseek64/lo_tell64)
  • debian/patches/CVE-2026-6477.patch: stack buffer overrun in libpq PQfn() (lo_read/lo_lseek64/lo_tell64)
  • CVE-2026-6477
• SECURITY UPDATE: covert timing channel in MD5 password comparison
  • debian/patches/CVE-2026-6478.patch: covert timing channel in MD5 password comparison
  • CVE-2026-6478
• SECURITY UPDATE: SQL injection and stack buffer overruns in refint contrib module
  • debian/patches/CVE-2026-6637.patch: SQL injection and stack buffer overruns in refint contrib module
  • CVE-2026-6637

• CVE-2026-6473: use palloc_array() in hstore_plperl/hstore_plpython to avoid integer overflow on 32-bit systems
• CVE-2026-6474: guard pg_strftime() callers against unsafe conditions and ensure null-terminated output to prevent format-string leak via crafted timezone names
• CVE-2026-6475: prevent path traversal in pg_rewind file operations by validating paths received from a rogue server endpoint
• CVE-2026-6477: add buf_size bounds-checking to pqFunctionCall3() and gate PQfn() via a new PQnfn() helper to prevent client-side buffer overrun in the large object interface (lo_export/lo_read/lo_lseek64/lo_tell64)
• CVE-2026-6479: track processed SSL/GSS negotiation attempts in ProcessStartupPacket() to prevent unbounded recursion causing backend stack overflow
• CVE-2026-6637: switch refint check_foreign_key() to StringInfo and quote key values to prevent SQL injection and stack buffer overruns

• SECURITY UPDATE: PostgreSQL 2026-05-14 security batch (CVE-2026-6473, 6474, 6475, 6477, 6478, 6479, 6637). Backports adapted from upstream REL_14_STABLE to PG 12 source.
  • debian/patches/CVE-2026-6473.patch: integer wraparound in ts_headline and ltree lquery parsing; bound StartSel/StopSel/FragmentDelimiter to PG_INT16_MAX and add overflow checks in parse_lquery (no pg_add_u16_overflow() in PG 12, manual PG_UINT16_MAX compare).
  • debian/patches/CVE-2026-6474.patch: externally-controlled format string in timeofday() via pg_strftime() with crafted timezones; guard against unsafe conditions.
  • debian/patches/CVE-2026-6475.patch: symlink following in pg_basebackup plain format and in pg_rewind allowing origin superuser to overwrite local files.
  • debian/patches/CVE-2026-6477.patch: mark PQfn() unsafe and fix overrun in libpq lo_export/lo_read/lo_lseek64/lo_tell64 frontend LO interface.
  • debian/patches/CVE-2026-6478.patch: covert timing channel in MD5 password comparison; replace memcmp with timingsafe_bcmp in SCRAM and MD5 password verification paths.
  • debian/patches/CVE-2026-6479.patch: uncontrolled recursion in ProcessStartupPacket() via alternating SSL/GSS negotiation requests.
  • debian/patches/CVE-2026-6637.patch: stack buffer overflow in the refint contrib module with attacker-controlled column names.
  • CVE-2026-6473
  • CVE-2026-6474
  • CVE-2026-6475
  • CVE-2026-6477
  • CVE-2026-6478
  • CVE-2026-6479
  • CVE-2026-6637

• SECURITY UPDATE: postgresql May-2026 CVE batch
  • debian/patches/CVE-2026-6473.patch: integer overflow fixes across multiple vulnerable sites: formatting.c size calculations (mul_size), intarray/ltxtquery findoprnd() left-offset overflow with int16 check, ltree lquery numvar/totallen overflow with PG_UINT16_MAX check, ts_headline option length overflow with per-option ERRCODE_INVALID_PARAMETER_VALUE checks, array_agg accumArrayResultArr() nitems overflow with MaxArraySize check, and hstore_plperl/hstore_plpython palloc overflow via mul_size().
  • debian/patches/CVE-2026-6474.patch: guard pg_strftime() callers and ensure null-terminated output on overflow; split timeofday() pg_strftime so the %Z timezone string is never embedded as a format string in subsequent snprintf().
  • debian/patches/CVE-2026-6475.patch: prevent path traversal in pg_rewind via path_is_safe_for_extraction() helper.
  • debian/patches/CVE-2026-6477.patch: harden PQfn()/pqFunctionCall3 against server-controlled buffer overruns in libpq large-object interface (lo_read, lo_lseek64 and lo_tell64 callers).
  • debian/patches/CVE-2026-6478.patch: add timingsafe_bcmp() helper and apply it in MD5/RADIUS/plain auth paths to prevent timing-channel leaks (SCRAM not in 9.5).
  • debian/patches/CVE-2026-6479.patch: fix unbounded recursive handling of SSL negotiation in ProcessStartupPacket() (convert recursive call to goto-retry loop).
  • debian/patches/CVE-2026-6637.patch: switch refint contrib check_foreign_key to StringInfo and quote_literal_cstr() to prevent SQL injection and stack buffer overruns.
  • CVE-2026-6473
  • CVE-2026-6474
  • CVE-2026-6475
  • CVE-2026-6477
  • CVE-2026-6478
  • CVE-2026-6479
  • CVE-2026-6637
• debian/patches/fix-regress-tzdata-LMT.patch: refresh src/test/regress expected output for date, timestamptz and horology tests so they match the LMT abbreviation emitted by current tzdata for pre-1883 dates.

• SECURITY UPDATE: postgresql May-2026 CVE batch
  • debian/patches/CVE-2026-6473.patch: integer overflow fixes across multiple vulnerable sites: hstore_plperl/hstore_plpython palloc sizing (mul_size), array_agg() nitems overflow, intarray/ltxtquery findoprnd() left-offset overflow, ltree lquery numvar/totallen overflow, and ts_headline option length overflow.
  • debian/patches/CVE-2026-6474.patch: guard pg_strftime() callers and ensure null-terminated output on overflow, plus split timeofday() pg_strftime so the %Z timezone string is never embedded as a format string in subsequent snprintf().
  • debian/patches/CVE-2026-6475.patch: prevent path traversal in pg_rewind file operations via path_is_safe_for_extraction() helper.
  • debian/patches/CVE-2026-6477.patch: harden PQfn()/pqFunctionCall3() against server-controlled buffer overruns in libpq large-object interface.
  • debian/patches/CVE-2026-6478.patch: add timingsafe_bcmp() helper and apply to MD5/SCRAM/RADIUS/plain auth-paths to prevent timing-channel leaks.
  • debian/patches/CVE-2026-6637.patch: switch refint contrib check_foreign_key to StringInfo and quote_literal_cstr() to prevent SQL injection and stack buffer overruns.
  • CVE-2026-6473
  • CVE-2026-6474
  • CVE-2026-6475
  • CVE-2026-6477
  • CVE-2026-6478
  • CVE-2026-6637
• debian/patches/fix-regress-tzdata-LMT.patch: refresh src/test/regress expected output for date, timestamptz and horology tests so that they match the LMT abbreviation emitted by current tzdata for pre-1883 America/Los_Angeles dates.

• CVE-2026-6473: formatting.c / contrib intarray / ltree: avoid integer overflow in size calculations
• CVE-2026-6474: timeofday / pg_strftime: guard against unsafe format codes and ensure null-termination on overflow
• CVE-2026-6475: prevent path traversal in pg_basebackup and pg_rewind via path_is_safe_for_extraction()
• CVE-2026-6477: libpq: harden PQfn() / pqFunctionCall3 against server-controlled buffer overruns in lo_read()
• CVE-2026-6478: authentication: add timingsafe_bcmp() helper and apply it in MD5 / SCRAM / RADIUS / plain auth paths
• CVE-2026-6479: postmaster: bound SSL/GSS negotiation recursion in ProcessStartupPacket()
• CVE-2026-6637: refint contrib: prevent SQL injection and buffer overruns in check_primary_key / check_foreign_key

• SECURITY UPDATE: Fix stack buffer overrun and SQL injection in refint contrib module
  • debian/patches/CVE-2026-6637.patch: Fix stack buffer overrun and SQL injection in refint contrib module, plus follow-up segfault fix in check_foreign_key() when a CASCADE update key value is NULL
  • CVE-2026-6637
• SECURITY UPDATE: Fix format-string memory disclosure via crafted time zone in timeofday() (also harden pg_strftime() error handling)
  • debian/patches/CVE-2026-6474.patch: Fix format-string memory disclosure via crafted time zone in timeofday() (also harden pg_strftime() error handling)
  • CVE-2026-6474
• SECURITY UPDATE: Use timingsafe_bcmp() in MD5 password and RADIUS authentication paths to prevent timing side-channel
  • debian/patches/CVE-2026-6478.patch: Use timingsafe_bcmp() in MD5 password and RADIUS authentication paths to prevent timing side-channel
  • CVE-2026-6478

PostgreSQL CREATE TYPE does not check multirange schema CREATE privilege. (CVE-2026-6472) PostgreSQL server undersizes allocations, via integer wraparound. (CVE-2026-6473) PostgreSQL timeofday() can disclose portions of server memory. (CVE-2026-6474) PostgreSQL pg_basebackup and pg_rewind can overwrite unrelated files of origin superuser choice. (CVE-2026-6475) PostgreSQL libpq lo_* functions let server superuser overwrite client stack memory. (CVE-2026-6477) PostgreSQL discloses MD5-hashed passwords via covert timing channel. (CVE-2026-6478) PostgreSQL SSL/GSS init causes denial of service, via uncontrolled recursion. (CVE-2026-6479) PostgreSQL refint allows stack buffer overflow and SQL injection. (CVE-2026-6637)

These are all security issues fixed in the postgresql14-14.23-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the postgresql15-15.18-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the postgresql16-16.14-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the postgresql17-17.10-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the libecpg6-18.4-1.1 package on the GA media of openSUSE Tumbleweed.

This update for postgresql18 fixes the following issues

Security issues:

• CVE-2026-6472: ensure the user has CREATE privilege on the schema specified (bsc#1265172).
• CVE-2026-6473: integer overflows in memory-allocation calculations (bsc#1265173).
• CVE-2026-6474: Guard against malicious time zone names (bsc#1265174).
• CVE-2026-6475: Prevent path traversal in pg_basebackup and pg_rewind (bsc#1265175).
• CVE-2026-6476: Properly quote subscription names in pg_createsubscriber (bsc#1265176).
• CVE-2026-6477: Mark PQfn() as unsafe, and avoid using it within libpq (bsc#1265177).
• CVE-2026-6478: Use timing-safe string comparisons in authentication code (bsc#1265178).
• CVE-2026-6479: Prevent unbounded recursion while processing startup packets (bsc#1265179).
• CVE-2026-6575: Detect faulty input when restoring attribute MCV statistics (bsc#1265180).
• CVE-2026-6637: Prevent SQL injection and buffer overruns in contrib/spi (bsc#1265181).
• CVE-2026-6638: Properly quote object names in logical replication origin checks (bsc#1265182).

Non security issue:

• Update to version 18.4.
• Get rid of update-alternatives for openSUSE/SLE 16.0 and newer to support immutable systems and transactional updates (jsc#PED-14820).