CVE-2026-58469 GNU Wget 1.25.0 Heap Buffer Underread via Metalink URL Parsing

What is CVE-2026-58469?

CVE-2026-58469 is a high-severity memory corruption vulnerability in gnuwget wget, published on 7 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

GNU Wget through 1.25.0, fixed in commit 37a40fc, contains a heap buffer underread vulnerability in the clean_metalink_string() function within src/metalink.c that allows a malicious server to trigger memory corruption by serving a Metalink document containing a whitespace-only URL. Attackers can cause the function to decrement a pointer past the start of the buffer when processing an all-whitespace Metalink URL, potentially leading to abnormal program behavior.

Weakness: CWE-125

Which versions are affected by CVE-2026-58469?

It affects 1 product.

Products include Gnu Wget.

How do I fix CVE-2026-58469?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-58469 being exploited?

There is no known exploitation of CVE-2026-58469 in the wild and no public exploit code.

Other vulnerabilities in gnuwget wget

• CVE-2019-5953 Memory corruption in GNU Wget Critical 9.8
• CVE-2014-4877 Path traversal in n/a Critical 9.3
• CVE-2024-38428 Other in n/a Critical 9.1
• CVE-2016-7098 Race condition in n/a High 8.1
• CVE-2018-20483 Information disclosure in n/a High 7.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-58469, ECHO-019f-ed29-0163, GHSA-fxf9-rxpj-26gx, JLSEC-2026-1158, ROOT-OS-ALPINE-322-CVE-2026-58469, ROOT-OS-ALPINE-323-CVE-2026-58469 and 5 more.