Vulnerability in Wwbn Avideo
CVE-2026-86189
WWBN AVideo contains a path traversal vulnerability in notify.ffmpeg.json.php that allows unauthenticated attackers to write files to arbitrary locations by supplying a caller-chosen path in the avideoRelativePath parameter. Attackers can replay any previously issued ciphertext as a notifyCode token, which is decrypted but never validated, to bypass authentication and write files to the application root and subdirectories.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.007 · change: +0.003
Affected products
Weakness classification (CWE)
References
- github.com/WWBN/AVideo/security/advisories/GHSA-cprx-fggj-7vpq (vendor-advisory)
- www.vulncheck.com/advisories/wwbn-avideo-unauthenticated-path-traversal-via-not… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-86189?
- CVE-2026-86189 is a critical-severity vulnerability in Wwbn Avideo, classified under External Control of File Name or Path. CVSS score: 9.8/10. Published 2026-09-05.
- How severe is CVE-2026-86189?
- Critical severity. CVSS v3 base score is 9.8 out of 10.