CVE-2026-116139 WWBN AVideo 26.0 through 29.3.0 Stored XSS via Comment Markdown Rendering

Medium 5.1 Published 25 Oct 2026 Updated 26 Oct 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-116139?

CVE-2026-116139 is a medium-severity vulnerability in WWBN AVideo, published on 25 Oct 2026.

Official description

WWBN AVideo 26.0 through 29.3.0 contains a stored cross-site scripting vulnerability that allows authenticated commenters to inject JavaScript because markDownToHTML() preserves event-handler attributes in leading HTML blocks. Attackers can post a comment starting with an img tag carrying an onerror handler, which bypasses the inline sanitizer and executes in viewers' browsers under the application origin.

Weakness: CWE-79

Which versions are affected by CVE-2026-116139?

How do I fix CVE-2026-116139?

No fix has been published for CVE-2026-116139 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-116139 being exploited?

There is no known exploitation of CVE-2026-116139 in the wild and no public exploit code.

Sources

Also known as GHSA-cx46-26xc-2w7f, GHSA-r52j-79hv-6mmf.