Medium severity · published Oct 25, 2026
CVE-2026-116139
WWBN AVideo 26.0 through 29.3.0 Stored XSS via Comment Markdown Rendering
New
5.4
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AV
AVideo · WWBN
26.0 through 29.3.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116139
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116139
github.com
https://github.com/WWBN/AVideo/commit/f13587c59346b4bf0f449273021d29b869594559
github.com
https://github.com/WWBN/AVideo/security/advisories/GHSA-cx46-26xc-2w7f
www.vulncheck.com
https://www.vulncheck.com/advisories/wwbn-avideo-26.0-through-29.3.0-stored-xss-via-comment-markdown-rendering
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