CVE-2026-58471

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.

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/c2640fe5171c59f87c58dc9fcb195b2d18b010ee	Patch
https://www.vulncheck.com/advisories/gnu-wget-heap-buffer-overflow-via-convert-fname-in-url-c	Patch Third Party Advisory

Configurations

Configuration 1 (hide)

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

History

09 Jul 2026, 16:02

Type	Values Removed	Values Added
CPE		cpe:2.3:a:gnu:wget::::::::
First Time		Gnu Gnu wget
References	~~() https://gitlab.com/gnuwget/wget/-/commit/c2640fe5171c59f87c58dc9fcb195b2d18b010ee -~~	() https://gitlab.com/gnuwget/wget/-/commit/c2640fe5171c59f87c58dc9fcb195b2d18b010ee - Patch
References	~~() https://www.vulncheck.com/advisories/gnu-wget-heap-buffer-overflow-via-convert-fname-in-url-c -~~	() https://www.vulncheck.com/advisories/gnu-wget-heap-buffer-overflow-via-convert-fname-in-url-c - Patch, Third Party Advisory

07 Jul 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-07 21:17

Updated : 2026-07-09 16:02

NVD link : CVE-2026-58471

Mitre link : CVE-2026-58471

CVE.ORG link : CVE-2026-58471

JSON object : View

Products Affected

gnu

wget

CWE

CWE-122

Heap-based Buffer Overflow

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