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CVE-2026-58471: Heap-based Buffer Overflow in gnuwget wget

0
Medium
VulnerabilityCVE-2026-58471cvecve-2026-58471
Published: 07/07/2026 (07/07/2026, 19:47:47 UTC)
Source: CVE Database V5
Vendor/Project: gnuwget
Product: wget

Description

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 v4.0

Score 6.0medium

Attack Vector
Network
Attack Complexity
High
Attack Requirements
None
Privileges Required
None
User Interaction
Passive
Vuln. Confidentiality
None
Vuln. Integrity
Low
Vuln. Availability
High
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

Technical Details

Data Version
5.2
Assigner Short Name
VulnCheck
Date Reserved
2026-06-30T20:20:33.790Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a4d6193c9d9e3dbe3cbea05

Added to database: 07/07/2026, 20:29:07 UTC

Last updated: 07/07/2026, 20:29:07 UTC

Views: 1

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