CVE-2026-58469

GNU Wget through 1.25.0, fixed in commit 37a40fc, contains a heap buffer underread vulnerability in the clean_metalink_string() function within src/metalink.c that allows a malicious server to trigger memory corruption by serving a Metalink document containing a whitespace-only URL. Attackers can cause the function to decrement a pointer past the start of the buffer when processing an all-whitespace Metalink URL, potentially leading to abnormal program behavior.

GNU Wget is a free software package for retrieving files using HTTP, HTTPS, FTP and FTPS the most widely-used Internet protocols. It is a non-interactive commandline tool, so it may easily be called from scripts, cron jobs, terminals without X-Windows support, etc.

Security Fix(es):

GNU Wget does not validate the IP address provided by an FTP PASV response while operating in FTP passive mode. A malicious FTP server, or an HTTP server that redirects to an FTP URL, can exploit this behavior to redirect Wget’s data connection to an arbitrary IP address and port. This allows an attacker to forge server-side requests (SSRF) from the machine running Wget, potentially accessing localhost services or internal network resources.(CVE-2026-15146)

GNU Wget through 1.25.0, fixed in commit 37a40fc, contains a heap buffer underread vulnerability in the clean_metalink_string() function within src/metalink.c that allows a malicious server to trigger memory corruption by serving a Metalink document containing a whitespace-only URL. Attackers can cause the function to decrement a pointer past the start of the buffer when processing an all-whitespace Metalink URL, potentially leading to abnormal program behavior.(CVE-2026-58469)

GNU Wget through 1.25.0, fixed in commit 43d3ba9, contains an integer overflow vulnerability in the parse_content_range() function within src/http.c that allows server-controlled values to cause signed integer arithmetic to overflow. Attackers can supply malicious Content-Range header values to trigger undefined behavior and download desynchronization in the affected client.(CVE-2026-58470)

GNU Wget through 1.25.0, fixed in commit c2640fe, contains a heap buffer overflow vulnerability in the convert_fname() function within src/url.c that allows remote attackers to trigger memory corruption through a server-supplied filename requiring character set conversion. When the output buffer is too small during iconv E2BIG reallocation, the reallocation logic miscalculates the remaining space, leading to a heap buffer overflow that can be exploited via a maliciously crafted server response.(CVE-2026-58471)

GNU Wget through 1.25.0, fixed in commit dd692d9, contains a heap buffer overflow vulnerability in the html_quote_string() function in src/convert.c that allows a remote attacker to trigger memory corruption by supplying a crafted HTML attribute with a large number of characters requiring entity encoding. A server-supplied HTML attribute causes a signed integer counter to overflow during output size accumulation, resulting in an undersized heap allocation and subsequent heap buffer overflow during the copy phase.(CVE-2026-58472)

The wget packages provide the GNU Wget file retrieval utility for HTTP, HTTPS, and FTP protocols.

Security Fix(es):

• wget: GNU Wget: Memory corruption via crafted Metalink URL (CVE-2026-58469)

• wget: GNU Wget: Heap buffer overflow via server-supplied filename leads to memory corruption (CVE-2026-58471)

• wget: GNU Wget: Arbitrary code execution or denial of service via crafted HTML attribute (CVE-2026-58472)

Bug Fix(es) and Enhancement(s):

• wget async unsafe code in signal handler context [rhel-8.10.z] (JIRA:Rocky Linux-145875)

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.

GNU Wget through 1.25.0, fixed in commit 37a40fc, contains a heap buffer underread vulnerability in the clean_metalink_string() function within src/metalink.c that allows a malicious server to trigger memory corruption by serving a Metalink document containing a whitespace-only URL. Attackers can cause the function to decrement a pointer past the start of the buffer when processing an all-whitespace Metalink URL, potentially leading to abnormal program behavior.

The wget packages provide the GNU Wget file retrieval utility for HTTP, HTTPS, and FTP protocols.

Security Fix(es):

• wget: GNU Wget: Memory corruption via crafted Metalink URL (CVE-2026-58469)
• wget: GNU Wget: Heap buffer overflow via server-supplied filename leads to memory corruption (CVE-2026-58471)
• wget: GNU Wget: Arbitrary code execution or denial of service via crafted HTML attribute (CVE-2026-58472)

Bug Fix(es) and Enhancement(s):

• wget async unsafe code in signal handler context [almalinux-8.10.z] (JIRA:AlmaLinux-145875)

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.

• CVE-2026-58469: fix heap buffer underread in clean_metalink_string()
• CVE-2026-58471: fix heap buffer overflow in convert_fname()
• CVE-2026-58472: fix integer/heap overflow in html_quote_string()

• SECURITY UPDATE: Heap buffer overflow via crafted HTML attribute encoding
  • debian/patches/CVE-2026-58472.patch: use size_t with INT_ADD_OK overflow checks when accumulating the encoded output size in html_quote_string() in src/convert.c, aborting on overflow instead of under-allocating
  • CVE-2026-58472
• SECURITY UPDATE: Heap buffer overflow in filename charset conversion
  • debian/patches/CVE-2026-58471.patch: correctly recompute the remaining output space on the iconv E2BIG reallocation path in convert_fname() in src/url.c
  • CVE-2026-58471
• SECURITY UPDATE: Heap buffer underread via all-whitespace Metalink URL
  • debian/patches/CVE-2026-58469.patch: add an end > beg bounds check in clean_metalink_string() in src/metalink.c to avoid decrementing the pointer before the start of the buffer
  • CVE-2026-58469

• SECURITY UPDATE: heap buffer under-read in clean_metalink_string()
  • debian/patches/CVE-2026-58469.patch: bound the backward whitespace scan with end > beg in src/metalink.c so an all-whitespace Metalink URL cannot read before the start of the buffer
  • CVE-2026-58469
• SECURITY UPDATE: heap buffer overflow in convert_fname()
  • debian/patches/CVE-2026-58471.patch: correctly track used and remaining space across the iconv E2BIG reallocation in src/url.c so the output buffer is not overflowed
  • CVE-2026-58471
• SECURITY UPDATE: integer and heap buffer overflow in html_quote_string()
  • debian/patches/CVE-2026-58472.patch: size the quoted string using overflow-checked accumulation (size_t with INT_ADD_WRAPV) in src/convert.c and abort on overflow instead of under-allocating
  • CVE-2026-58472

• CVE-2026-58469: fix heap buffer underread in clean_metalink_string()
• CVE-2026-58471: fix heap buffer overflow in convert_fname()
• CVE-2026-58472: fix integer/heap overflow in html_quote_string()

• CVE-2026-58469: fix heap buffer underread in clean_metalink_string()
• CVE-2026-58471: fix heap buffer overflow in convert_fname()
• CVE-2026-58472: fix integer/heap overflow in html_quote_string()

Updated wget packages fix security vulnerabilities: -CVE-2026-58469 Wget incorrectly handled Metalink documents containing a whitespace-only URL. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Mageia 9 and Mageia 10. -CVE-2026-58470 : Wget incorrectly handled Content-Range header values, leading to an integer overflow. A remote attacker could possibly use this issue to cause download desynchronization. -CVE-2026-58471 : Wget incorrectly handled character set conversion of server-supplied filenames. A remote attacker could possibly use this issue to cause a denial of service or possibly execute arbitrary code. This issue affected Mageia9 and Mageia 10. -CVE-2026-58472: It was discovered that Wget incorrectly handled HTML attributes requiring entity encoding. A remote attacker could possibly use this issue to cause a denial of service or possibly execute arbitrary code. -CVE-2026-15146: GNU Wget did not validate the IP address provided by an FTP PASV response while operating in FTP passive mode. A malicious FTP server, or an HTTP server that redirects to an FTP URL, could exploit this behavior to redirect Wget's data connection to an arbitrary IP address and port. This allowed an attacker to forge server-side requests (SSRF) from the machine running Wget, potentially accessing localhost services or internal network resources.

These are all security issues fixed in the wget-1.25.0-3.1 package on the GA media of openSUSE Tumbleweed.

This update for wget fixes the following issues:

Security issued fixed:

• CVE-2026-15146: unvalidated IP address in an FTP PASV response can lead to server-side request forgery (bsc#1271320).
• CVE-2026-58469: Metalink document containing a whitespace-only URL can cause a heap buffer underread (bsc#1271033).
• CVE-2026-58470: server-controlled Content-Range header values can cause an integer overflow in parse_content_range() (bsc#1271034).
• CVE-2026-58471: server-supplied filenames requiring character set conversion could lead to heap memory corruption (bsc#1271035).
• CVE-2026-58472: crafted HTML attribute with a large number of characters requiring entity encoding can lead to a heap buffer overflow (bsc#1271036).

Other updates and bugfixes:

• Fix segmentation fault in metalink4 (bsc#1273449).
• Fix metalink regression from CVE-2026-58469 fix (bsc#1272219).
  • See: commit 7b1cdecc49bc77bde220fc575c8a00386c3f3bcf from https://gitlab.com/gnuwget/wget.

Root has patched CVE-2026-58469 in the wget package for Root:Alpine:3.22. Multiple fixed versions available.

Root has patched CVE-2026-58469 in the wget package for Root:Alpine:3.23. Multiple fixed versions available.

Root has patched CVE-2026-58469 in the wget package for Root:Debian:11. Multiple fixed versions available.

Root has patched CVE-2026-58469 in the wget package for Root:Debian:12. Multiple fixed versions available.

Root has patched CVE-2026-58469 in the wget package for Root:Debian:13. Multiple fixed versions available.

This update for wget fixes the following issues:

• CVE-2026-15146: unvalidated IP address in an FTP PASV response can lead to server-side request forgery (bsc#1271320).
• CVE-2026-58469: Metalink document containing a whitespace-only URL can cause a heap buffer underread (bsc#1271033).
• CVE-2026-58470: server-controlled Content-Range header values can cause an integer overflow in parse_content_range() (bsc#1271034).
• CVE-2026-58471: server-supplied filenames requiring character set conversion could lead to heap memory corruption (bsc#1271035).
• CVE-2026-58472: crafted HTML attribute with a large number of characters requiring entity encoding can lead to a heap buffer overflow (bsc#1271036).
• Fix metalink regression from CVE-2026-58469 fix (bsc#1272219).

This update for wget fixes the following issues

• CVE-2026-15146: unvalidated IP address in an FTP PASV response can lead to server-side request forgery (bsc#1271320).
• CVE-2026-58469: Metalink document containing a whitespace-only URL can cause a heap buffer underread (bsc#1271033).
• CVE-2026-58470: server-controlled Content-Range header values can cause an integer overflow in parse_content_range() (bsc#1271034).
• CVE-2026-58471: server-supplied filenames requiring character set conversion could lead to heap memory corruption (bsc#1271035).
• CVE-2026-58472: crafted HTML attribute with a large number of characters requiring entity encoding can lead to a heap buffer overflow (bsc#1271036).
• Fix metalink regression from CVE-2026-58469 fix (bsc#1272219).

This update for wget fixes the following issues:

Security issued fixed:

• CVE-2026-15146: unvalidated IP address in an FTP PASV response can lead to server-side request forgery (bsc#1271320).
• CVE-2026-58469: Metalink document containing a whitespace-only URL can cause a heap buffer underread (bsc#1271033).
• CVE-2026-58470: server-controlled Content-Range header values can cause an integer overflow in parse_content_range() (bsc#1271034).
• CVE-2026-58471: server-supplied filenames requiring character set conversion could lead to heap memory corruption (bsc#1271035).
• CVE-2026-58472: crafted HTML attribute with a large number of characters requiring entity encoding can lead to a heap buffer overflow (bsc#1271036).

Other updates and bugfixes:

• Fix segmentation fault in metalink4 (bsc#1273449).
• Fix metalink regression from CVE-2026-58469 fix (bsc#1272219).
  • See: commit 7b1cdecc49bc77bde220fc575c8a00386c3f3bcf from https://gitlab.com/gnuwget/wget.

This update for wget fixes the following issues:

Security issued fixed:

• CVE-2026-15146: unvalidated IP address in an FTP PASV response can lead to server-side request forgery (bsc#1271320).
• CVE-2026-58469: Metalink document containing a whitespace-only URL can cause a heap buffer underread (bsc#1271033).
• CVE-2026-58470: server-controlled Content-Range header values can cause an integer overflow in parse_content_range() (bsc#1271034).
• CVE-2026-58471: server-supplied filenames requiring character set conversion could lead to heap memory corruption (bsc#1271035).
• CVE-2026-58472: crafted HTML attribute with a large number of characters requiring entity encoding can lead to a heap buffer overflow (bsc#1271036).

Other updates and bugfixes:

• Fix segmentation fault in metalink4 (bsc#1273449).
• Fix metalink regression from CVE-2026-58469 fix (bsc#1272219).
  • See: commit 7b1cdecc49bc77bde220fc575c8a00386c3f3bcf from https://gitlab.com/gnuwget/wget.

This update for wget fixes the following issues:

• CVE-2026-15146: unvalidated IP address in an FTP PASV response can lead to server-side request forgery (bsc#1271320).
• CVE-2026-58469: Metalink document containing a whitespace-only URL can cause a heap buffer underread (bsc#1271033).
• CVE-2026-58470: server-controlled values can cause an integer overflow in parse_content_range() (bsc#1271034).
• CVE-2026-58471: server-supplied filenames requiring character set conversion could lead to heap memory corruption (bsc#1271035).
• CVE-2026-58472: crafted HTML attribute with a large number of characters can lead to a heap buffer overflow (bsc#1271036).

This update for wget fixes the following issues:

• CVE-2026-15146: unvalidated IP address in an FTP PASV response can lead to server-side request forgery (bsc#1271320).
• CVE-2026-58469: Metalink document containing a whitespace-only URL can cause a heap buffer underread (bsc#1271033).
• CVE-2026-58470: server-controlled Content-Range header values can cause an integer overflow in parse_content_range() (bsc#1271034).
• CVE-2026-58471: server-supplied filenames requiring character set conversion could lead to heap memory corruption (bsc#1271035).
• CVE-2026-58472: crafted HTML attribute with a large number of characters requiring entity encoding can lead to a heap buffer overflow (bsc#1271036).
• Fix metalink regression from CVE-2026-58469 fix (bsc#1272219).

This update for wget fixes the following issue

• Fix metalink regression from CVE-2026-58469 fix (bsc#1272219, bsc#1271033).

It was discovered that Wget mishandled semicolons in the userinfo subcomponent of a URL. A remote attacker could possibly use this issue to trick a user into connecting to a different host than intended. This issue only affected Ubuntu 14.04 LTS. (CVE-2024-38428)

It was discovered that Wget incorrectly handled Metalink documents containing a whitespace-only URL. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-58469)

It was discovered that Wget incorrectly handled Content-Range header values, leading to an integer overflow. A remote attacker could possibly use this issue to cause download desynchronization. (CVE-2026-58470)

It was discovered that Wget incorrectly handled character set conversion of server-supplied filenames. A remote attacker could possibly use this issue to cause a denial of service or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-58471)

It was discovered that Wget incorrectly handled HTML attributes requiring entity encoding. A remote attacker could possibly use this issue to cause a denial of service or possibly execute arbitrary code. (CVE-2026-58472)