CVE-2026-39369
WWBN AVideo's GIF poster fetch bypasses traversal scrubbing and exposes local files through public media URLs
Description
WWBN AVideo is an open source video platform. In versions 26.0 and prior, objects/aVideoEncoderReceiveImage.json.php allowed an authenticated uploader to fetch attacker-controlled same-origin /videos/... URLs, bypass traversal scrubbing, and expose server-local files through the GIF poster storage path. The vulnerable GIF branch could be abused to read local files such as /etc/passwd or application source files and republish those bytes through a normal public GIF media URL.
INFO
Published Date :
April 7, 2026, 8:16 p.m.
Last Modified :
April 22, 2026, 6:50 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update AVideo to version 26.1 or later.
- Review and sanitize all user-uploaded file paths.
- Enforce strict access controls for file storage.
- Validate all user inputs rigorously.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-39369.
| URL | Resource |
|---|---|
| https://github.com/WWBN/AVideo/commit/2375eb5e0a6d3cbcfb05377657d0820a7d470b1d | Patch |
| https://github.com/WWBN/AVideo/security/advisories/GHSA-f4f9-627c-jh33 | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-39369 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-39369
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-39369 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-39369 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 22, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:wwbn:avideo:*:*:*:*:*:*:*:* versions up to (including) 26.0 Added Reference Type GitHub, Inc.: https://github.com/WWBN/AVideo/commit/2375eb5e0a6d3cbcfb05377657d0820a7d470b1d Types: Patch Added Reference Type GitHub, Inc.: https://github.com/WWBN/AVideo/security/advisories/GHSA-f4f9-627c-jh33 Types: Third Party Advisory -
CVE Modified by [email protected]
Apr. 21, 2026
Action Type Old Value New Value Added Reference https://github.com/WWBN/AVideo/commit/2375eb5e0a6d3cbcfb05377657d0820a7d470b1d -
New CVE Received by [email protected]
Apr. 07, 2026
Action Type Old Value New Value Added Description WWBN AVideo is an open source video platform. In versions 26.0 and prior, objects/aVideoEncoderReceiveImage.json.php allowed an authenticated uploader to fetch attacker-controlled same-origin /videos/... URLs, bypass traversal scrubbing, and expose server-local files through the GIF poster storage path. The vulnerable GIF branch could be abused to read local files such as /etc/passwd or application source files and republish those bytes through a normal public GIF media URL. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L Added CWE CWE-22 Added Reference https://github.com/WWBN/AVideo/security/advisories/GHSA-f4f9-627c-jh33