CVE-2026-58471: GNU Wget

High severity, CVSS 7.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• GNU Wget: up to and including 1.25.0

Published 2026-07-07. Last modified 2026-07-09.