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.
- Published Jul 7, 2026
- CVSS 6.0 medium
- 0.4% chance of exploitation in the next 30 days (EPSS)
- A fix is available
Affected software
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