Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate 2026-07-07T19:50:53 wget: GNU Wget: Arbitrary code execution or denial of service via crafted HTML attribute 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H CWE-131

GNU Wget through 1.25.0, fixed in commit dd692d9, contains a heap buffer overflow vulnerability in the html_quote_string() function in src/convert.c that allows a remote attacker to trigger memory corruption by supplying a crafted HTML attribute with a large number of characters requiring entity encoding. A server-supplied HTML attribute causes a signed integer counter to overflow during output size accumulation, resulting in an undersized heap allocation and subsequent heap buffer overflow during the copy phase.

A flaw was found in GNU Wget. A remote attacker can exploit a heap buffer overflow vulnerability in the `html_quote_string()` function by providing a specially crafted HTML attribute. This can lead to memory corruption and potentially result in arbitrary code execution or a denial of service.

This Moderate impact heap buffer overflow in GNU Wget occurs when processing HTML attributes with extensive entity encoding. Successful exploitation requires user interaction, as a victim must download a specially crafted HTML file, and is further constrained by high attack complexity. This limits the direct risk to Red Hat systems where Wget is typically used for trusted content retrieval. Users are advised to avoid retrieving content from untrusted or unverified sources using Wget. Red Hat Enterprise Linux 10 Affected wget Red Hat Enterprise Linux 6 Affected wget Red Hat Enterprise Linux 7 Affected wget Red Hat Enterprise Linux 8 Affected wget Red Hat Enterprise Linux 9 Affected wget https://www.cve.org/CVERecord?id=CVE-2026-58472 https://nvd.nist.gov/vuln/detail/CVE-2026-58472 https://gitlab.com/gnuwget/wget/-/commit/dd692d9cea5335b181d877ae917fe6e75587a812 https://www.vulncheck.com/advisories/gnu-wget-heap-buffer-overflow-via-html-attribute-encoding