CVE-2026-116139

EUVD-2026-109544
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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
5.4 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
wwbnavideo
26.0 ≤
𝑥
≤ 29.3.0
CNA
Common Weakness Enumeration
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