What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-25 · updated 2026-10-26
• Weakness: CWE-79

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.

Affected products

• WWBN AVideo: from 26.0 through 29.3.0

References

• https://github.com/WWBN/AVideo/commit/f13587c59346b4bf0f449273021d29b869594559
• https://github.com/WWBN/AVideo/security/advisories/GHSA-cx46-26xc-2w7f
• https://www.vulncheck.com/advisories/wwbn-avideo-26.0-through-29.3.0-stored-xss-via-comment-markdown-rendering

Get alerted when CVE-2026-116139 or the next vulnerability affects your stack