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.

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.

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.

Affected products

Wwbn Avideo

Weakness classification (CWE)

CWE-73 — External Control of File Name or Path

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (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.