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CVE-2026-35549

An issue was discovered in MariaDB Server before 11.4.10, 11.5.x through 11.8.x before 11.8.6,...

6.5 MediumFix available

An issue was discovered in MariaDB Server before 11.4.10, 11.5.x through 11.8.x before 11.8.6, and 12.x before 12.2.2. If the caching_sha2_password authentication plugin is installed, and some user accounts are configured to use it, a large packet can crash the server because sha256_crypt_r uses alloca.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.27%Up 0.2 points since Apr 3, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.5

An issue was discovered in MariaDB Server before 11.4.10, 11.5.x through 11.8.x before 11.8.6, and 12.x before 12.2.2. If the caching_sha2_password authentication plugin is installed, and some user accounts are configured to use it, a large packet can crash the server because sha256_crypt_r uses alloca.

Record
CVE-2026-35549
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-789
Updated
2026-11-02
EUVDEUVD-2026-18595 6.5

An issue was discovered in MariaDB Server before 11.4.10, 11.5.x through 11.8.x before 11.8.6, and 12.x before 12.2.2. If the caching_sha2_password authentication plugin is installed, and some user accounts are configured to use it, a large packet can crash the server because sha256_crypt_r uses alloca.

Record
EUVD-2026-18595
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-3xgj-m9hf-j98g 6.5

An issue was discovered in MariaDB Server before 11.4.10, 11.5.x through 11.8.x before 11.8.6,...

An issue was discovered in MariaDB Server before 11.4.10, 11.5.x through 11.8.x before 11.8.6, and 12.x before 12.2.2. If the caching_sha2_password authentication plugin is installed, and some user accounts are configured to use it, a large packet can crash the server because sha256_crypt_r uses alloca.

Record
GHSA-3xgj-m9hf-j98g
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-789
Updated
2026-11-02
NVD 6.5

An issue was discovered in MariaDB Server before 11.4.10, 11.5.x through 11.8.x before 11.8.6, and 12.x before 12.2.2. If the caching_sha2_password authentication plugin is installed, and some user accounts are configured to use it, a large packet can crash the server because sha256_crypt_r uses alloca.

Record
CVE-2026-35549
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-789
Updated
2026-11-06
OSVBELL-CVE-2026-35549 6.5
Record
BELL-CVE-2026-35549
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSV 6.5

An issue was discovered in MariaDB Server before 11.4.10, 11.5.x through 11.8.x before 11.8.6, and 12.x before 12.2.2. If the caching_sha2_password authentication plugin is installed, and some user accounts are configured to use it, a large packet can crash the server because sha256_crypt_r uses alloca.

Record
CVE-2026-35549
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-789
Updated
2026-11-02
Show 9 moreShow less
OSVDEBIAN-CVE-2026-35549 6.5

An issue was discovered in MariaDB Server before 11.4.10, 11.5.x through 11.8.x before 11.8.6, and 12.x before 12.2.2. If the caching_sha2_password authentication plugin is installed, and some user accounts are configured to use it, a large packet can crash the server because sha256_crypt_r uses alloca.

Record
DEBIAN-CVE-2026-35549
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-07
OSVUBUNTU-CVE-2026-35549 6.5

An issue was discovered in MariaDB Server before 11.4.10, 11.5.x through 11.8.x before 11.8.6, and 12.x before 12.2.2. If the caching_sha2_password authentication plugin is installed, and some user accounts are configured to use it, a large packet can crash the server because sha256_crypt_r uses alloca.

Record
UBUNTU-CVE-2026-35549
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVBIT-mariadb-2026-35549 No score

An issue was discovered in MariaDB Server before 11.4.10, 11.5.x through 11.8.x before 11.8.6, and 12.x before 12.2.2. If the caching_sha2_password authentication plugin is installed, and some user accounts are configured to use it, a large packet can crash the server because sha256_crypt_r uses alloca.

Record
BIT-mariadb-2026-35549
Updated
2026-11-02
OSVBIT-mariadb-min-2026-35549 No score

An issue was discovered in MariaDB Server before 11.4.10, 11.5.x through 11.8.x before 11.8.6, and 12.x before 12.2.2. If the caching_sha2_password authentication plugin is installed, and some user accounts are configured to use it, a large packet can crash the server because sha256_crypt_r uses alloca.

Record
BIT-mariadb-min-2026-35549
Updated
2026-11-02
OSVBIT-mysql-client-2026-35549 No score

An issue was discovered in MariaDB Server before 11.4.10, 11.5.x through 11.8.x before 11.8.6, and 12.x before 12.2.2. If the caching_sha2_password authentication plugin is installed, and some user accounts are configured to use it, a large packet can crash the server because sha256_crypt_r uses alloca.

Record
BIT-mysql-client-2026-35549
Updated
2026-11-02
OSVopenSUSE-SU-2026:10897-1 No score

libmariadbd-devel-11.8.7-1.1 on GA media

These are all security issues fixed in the libmariadbd-devel-11.8.7-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:10897-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:20933-1 No score

Security update for mariadb

This update for mariadb fixes the following issues

Update to 11.8.8:

  • CVE-2026-3494: audit plugin comment handling bypass (bsc#1259176).
  • CVE-2026-34303: mysql: optimizer unspecified vulnerability (bsc#1266435).
  • CVE-2026-35549: SHA2 auth plugin crash on large packets (bsc#1261413).
  • CVE-2026-44168: wsrep SST unsafe parameter handling on the donor side (bsc#1266442).
  • CVE-2026-44169: authorization bypass in role-based routine-level privilege check exposes stored routine definitions (bsc#1266441).
  • CVE-2026-44170: argument injection in CONNECT REST Xcurl on Windows via unsanitized URL (bsc#1266440).
  • CVE-2026-44171: path traversal in mbstream (bsc#1266439).
  • CVE-2026-44172: mysql_real_escape_string() incorrectly handled big5 (bsc#1266438).
  • CVE-2026-44173: FILE privilege was not checked for subqueries in the FROM clause (bsc#1266437).
  • CVE-2026-48163: wsrep SST unsafe parameter handling on the donor side (bsc#1266815).
  • CVE-2026-48165: unsafe usage of wsrep_sst_receive_address values on the joiner side (bsc#1266814).
  • CVE-2026-49261: unsafe parameter handing in wsrep_notify_cmd (bsc#1267542).

https://mariadb.com/docs/release-notes/community-server/11.8/11.8.8 https://mariadb.com/docs/release-notes/community-server/changelogs/11.8/11.8.8

Record
openSUSE-SU-2026:20933-1
Updated
2026-11-02
OSVSUSE-SU-2026:22095-1 No score

Security update for mariadb

This update for mariadb fixes the following issues

Update to 11.8.8:

  • CVE-2026-3494: audit plugin comment handling bypass (bsc#1259176).
  • CVE-2026-34303: mysql: optimizer unspecified vulnerability (bsc#1266435).
  • CVE-2026-35549: SHA2 auth plugin crash on large packets (bsc#1261413).
  • CVE-2026-44168: wsrep SST unsafe parameter handling on the donor side (bsc#1266442).
  • CVE-2026-44169: authorization bypass in role-based routine-level privilege check exposes stored routine definitions (bsc#1266441).
  • CVE-2026-44170: argument injection in CONNECT REST Xcurl on Windows via unsanitized URL (bsc#1266440).
  • CVE-2026-44171: path traversal in mbstream (bsc#1266439).
  • CVE-2026-44172: mysql_real_escape_string() incorrectly handled big5 (bsc#1266438).
  • CVE-2026-44173: FILE privilege was not checked for subqueries in the FROM clause (bsc#1266437).
  • CVE-2026-48163: wsrep SST unsafe parameter handling on the donor side (bsc#1266815).
  • CVE-2026-48165: unsafe usage of wsrep_sst_receive_address values on the joiner side (bsc#1266814).
  • CVE-2026-49261: unsafe parameter handing in wsrep_notify_cmd (bsc#1267542).

https://mariadb.com/docs/release-notes/community-server/11.8/11.8.8 https://mariadb.com/docs/release-notes/community-server/changelogs/11.8/11.8.8

Record
SUSE-SU-2026:22095-1
Updated
2026-11-02
OSVSUSE-SU-2026:2330-1 No score

Security update for mariadb

This update for mariadb fixes the following issues:

  • CVE-2026-3494: audit plugin comment handling bypass (bsc#1259176).
  • CVE-2026-34303: mysql: optimizer unspecified vulnerability (bsc#1266435).
  • CVE-2026-35549: SHA2 auth plugin crash on large packets (bsc#1261413).
  • CVE-2026-44168: wsrep SST unsafe parameter handling on the donor side (bsc#1266442).
  • CVE-2026-44169: authorization bypass in role-based routine-level privilege check exposes stored routine definitions (bsc#1266441).
  • CVE-2026-44170: argument injection in CONNECT REST Xcurl on Windows via unsanitized URL (bsc#1266440).
  • CVE-2026-44171: path traversal in mbstream (bsc#1266439).
  • CVE-2026-44172: mysql_real_escape_string() incorrectly handled big5 (bsc#1266438).
  • CVE-2026-44173: FILE privilege was not checked for subqueries in the FROM clause (bsc#1266437).
  • CVE-2026-48163: wsrep SST unsafe parameter handling on the donor side (bsc#1266815).
  • CVE-2026-48165: unsafe usage of wsrep_sst_receive_address values on the joiner side (bsc#1266814).
  • CVE-2026-49261: unsafe parameter handling in wsrep_notify_cmd (bsc#1267542).

Changes for mariadb:

Record
SUSE-SU-2026:2330-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
mariadb
Alpaquita:25
 11.4.5-r0 up to 11.4.10-r0
11.4.10-r0
mariadb
Alpaquita:stream
 10.11.4-r0 up to 11.8.6-r0
11.8.6-r0
mariadb
Bitnami
 before 11.4.10, 11.5.0 up to 11.8.6, 12.0.0 up to 12.2.2
11.4.1011.8.612.2.2
mariadb-min
Bitnami
 before 11.4.10, 11.5.0 up to 11.8.6, 12.0.0 up to 12.2.2
11.4.1011.8.612.2.2
mysql-client
Bitnami
 before 11.4.10, 11.5.0 up to 11.8.6, 12.0.0 up to 12.2.2
11.4.1011.8.612.2.2
mariadb
Debian:13
 before 1:11.8.6-0+deb13u1, plus listed versions
1:11.8.2-11:11.8.3-0+deb13u11:11.8.3-11:11.8.5-11:11.8.5-2
Show 5 moreShow less
1:11.8.5-31:11.8.5-3~exp11:11.8.5-3~exp21:11.8.5-3~exp31:11.8.5-4
1:11.8.6-0+deb13u1
mariadb
Debian:14
 before 1:11.8.6-1, plus listed versions
1:11.8.2-11:11.8.3-11:11.8.5-11:11.8.5-21:11.8.5-3
Show 4 moreShow less
1:11.8.5-3~exp11:11.8.5-3~exp21:11.8.5-3~exp31:11.8.5-4
1:11.8.6-1
mariadb
SUSE:Linux Enterprise Server 16.0
From an advisory covering 12 CVEs
 before 11.8.8-160000.1.1
11.8.8-160000.1.1
mariadb
SUSE:Linux Enterprise Server for SAP applications 16.0
From an advisory covering 12 CVEs
 before 11.8.8-160000.1.1
11.8.8-160000.1.1
mariadb
SUSE:Linux Enterprise Module for Package Hub 15 SP7
From an advisory covering 12 CVEs
 before 11.8.8-150700.3.15.1
11.8.8-150700.3.15.1
Show 9 moreShow less
Affected packages
PackageAffectedFixed
mariadb
SUSE:Linux Enterprise Module for Server Applications 15 SP7
From an advisory covering 12 CVEs
 before 11.8.8-150700.3.15.1
11.8.8-150700.3.15.1
mariadb-10.0
Ubuntu:16.04:LTS
 All versions, plus listed versions
10.0.20-0ubuntu0.15.04.110.0.22-0ubuntu110.0.23-110.0.23-210.0.24-7
Show 9 moreShow less
10.0.25-0ubuntu0.16.04.110.0.27-0ubuntu0.16.04.110.0.28-0ubuntu0.16.04.110.0.29-0ubuntu0.16.04.110.0.31-0ubuntu0.16.04.210.0.33-0ubuntu0.16.04.110.0.34-0ubuntu0.16.04.110.0.36-0ubuntu0.16.04.110.0.38-0ubuntu0.16.04.1
 None known
mariadb-10.1
Ubuntu:18.04:LTS
 All versions, plus listed versions
10.1.25-11:10.1.29-61:10.1.34-0ubuntu0.18.04.11:10.1.38-0ubuntu0.18.04.11:10.1.38-0ubuntu0.18.04.2
Show 6 moreShow less
1:10.1.40-0ubuntu0.18.04.11:10.1.41-0ubuntu0.18.04.11:10.1.43-0ubuntu0.18.04.11:10.1.44-0ubuntu0.18.04.11:10.1.47-0ubuntu0.18.04.11:10.1.48-0ubuntu0.18.04.1
 None known
mariadb-10.3
Ubuntu:20.04:LTS
 All versions, plus listed versions
1:10.3.17-11:10.3.18-11:10.3.19-11:10.3.21-21:10.3.22-1
Show 10 moreShow less
1:10.3.22-1ubuntu11:10.3.25-0ubuntu0.20.04.11:10.3.29-0ubuntu0.20.04.11:10.3.30-0ubuntu0.20.04.11:10.3.31-0ubuntu0.20.04.11:10.3.32-0ubuntu0.20.04.11:10.3.34-0ubuntu0.20.04.11:10.3.37-0ubuntu0.20.04.11:10.3.38-0ubuntu0.20.04.11:10.3.39-0ubuntu0.20.04.2
 None known
mariadb-10.6
Ubuntu:22.04:LTS
 All versions, plus listed versions
1:10.6.7-2ubuntu11:10.6.7-2ubuntu1.11:10.6.11-0ubuntu0.22.04.11:10.6.12-0ubuntu0.22.04.11:10.6.16-0ubuntu0.22.04.1
Show 4 moreShow less
1:10.6.18-0ubuntu0.22.04.11:10.6.21-0ubuntu0.22.04.21:10.6.22-0ubuntu0.22.04.11:10.6.23-0ubuntu0.22.04.1
 None known
mariadb
Ubuntu:24.04:LTS
 All versions, plus listed versions
1:10.11.4-11:10.11.5-31:10.11.6-11:10.11.6-21:10.11.7-2ubuntu1
Show 5 moreShow less
1:10.11.7-2ubuntu21:10.11.8-0ubuntu0.24.04.11:10.11.11-0ubuntu0.24.04.21:10.11.13-0ubuntu0.24.04.11:10.11.14-0ubuntu0.24.04.1
 None known
mariadb
Ubuntu:25.10
 All versions, plus listed versions
1:11.4.5-11:11.8.1-41:11.8.1-5ubuntu21:11.8.2-1ubuntu11:11.8.3-11:11.8.3-1build1
 None known
mariadb
openSUSE:Tumbleweed
From an advisory covering 9 CVEs
 before 11.8.7-1.1
11.8.7-1.1
mariadb
openSUSE:Leap 16.0
From an advisory covering 12 CVEs
 before 11.8.8-160000.1.1
11.8.8-160000.1.1

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-35549 is a medium vulnerability (CVSS 6.5) in Mariadb, published April 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.27%, the 18th percentile. Fixed in mariadb 11.4.10-r0.

References

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