WWBN AVideo up to 29.0 Notify notify.ffmpeg.json.php avideoRelativePath path traversal

Summaryinfo

A vulnerability identified as critical has been detected in WWBN AVideo up to 29.0. This impacts an unknown function of the file notify.ffmpeg.json.php of the component Notify. This manipulation of the argument avideoRelativePath causes path traversal. This vulnerability is handled as CVE-2026-86189. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in WWBN AVideo up to 29.0. Affected by this vulnerability is some unknown functionality of the file notify.ffmpeg.json.php of the component Notify. The manipulation of the argument avideoRelativePath with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-86189 since 09/05/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/05/2026). The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

By approaching the search of inurl:notify.ffmpeg.json.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• WWBN

Name

• AVideo

Version

• 29.0

License

• open-source

Website

• Product: https://github.com/WWBN/AVideo/

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CPE 2.2info

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