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 tri

mediumCVSS 5.9CVE-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.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 5.9
Published: 2026-07-07
Last updated: 2026-07-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-58471

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-584710.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 13% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-58471	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[NEW] [medium] wget: Multiple vulnerabilities allow denial of servicecert-bund

Recent advisories for GNU Wget

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

mediumCVE-2026-15146: GNU Wget does not validate the IP address provided by an FTP PASV response while operating in …nvd · 2026-07-10
mediumCVE-2026-58472: GNU Wget through 1.25.0, fixed in commit dd692d9, contains a heap buffer overflow vulnerabilit…nvd · 2026-07-07
mediumCVE-2026-58470: GNU Wget through 1.25.0, fixed in commit 43d3ba9, contains an integer overflow vulnerability i…nvd · 2026-07-07
highCVE-2026-58469: GNU Wget through 1.25.0, fixed in commit 37a40fc, contains a heap buffer underread vulnerabili…nvd · 2026-07-07