CVE-2026-58472

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.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://gitlab.com/gnuwget/wget/-/commit/dd692d9cea5335b181d877ae917fe6e75587a812	Patch
https://www.vulncheck.com/advisories/gnu-wget-heap-buffer-overflow-via-html-attribute-encoding	Patch Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:gnu:wget:*:*:*:*:*:*:*:*

History

25 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) GNU Wget hasta 1.25.0, corregido en el commit dd692d9, contiene una vulnerabilidad de desbordamiento de búfer de pila en la función html_quote_string() en src/convert.c que permite a un atacante remoto activar la corrupción de memoria al proporcionar un atributo HTML manipulado con un gran número de caracteres que requieren codificación de entidades. Un atributo HTML proporcionado por el servidor provoca que un contador de enteros con signo se desborde durante la acumulación del tamaño de salida, lo que resulta en una asignación de pila de tamaño insuficiente y un desbordamiento de búfer de pila posterior durante la fase de copia.

Information

Published : 2026-07-07 21:17

Updated : 2026-10-25 20:10

NVD link : CVE-2026-58472

Mitre link : CVE-2026-58472

CVE.ORG link : CVE-2026-58472

JSON object : View

Products Affected

gnu

wget

CWE

CWE-190

Integer Overflow or Wraparound

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