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Advisory details: gitlab / packagist/wwbn/avideo/CVE-2026-33354
Advisory ID gitlab/packagist/wwbn/avideo/CVE-2026-33354
Aliases CVE-2026-33354
GHSA-4jw9-5hrc-m4j6
Summary AVideo has an authenticated arbitrary local file read via `chunkFile` path injection in `aVideoEncoder.json.php` `POST /objects/aVideoEncoder.json.php` accepts a requester-controlled `chunkFile` parameter intended for staged upload chunks. Instead of restricting that path to trusted server-generated chunk locations, the endpoint accepts arbitrary local filesystem paths that pass `isValidURLOrPath()`. That helper allows files under broad server directories including `/var/www/`, the application root, cache, tmp, and `videos`, only rejecting `.php` files. For an authenticated uploader editing their own video, this becomes an arbitrary local file read. The endpoint copies the attacker-chosen local file into the attacker's public video storage path, after which it can be downloaded over HTTP. I confirmed this locally by creating an attacker-owned video, then calling `aVideoEncoder.json.php` with `videos_id=<own video>`, `format=mp4`, and `chunkFile=/var/www/html/AVideo/.compose/letsencrypt/live/localhost/privkey.pem`. The resulting public video URL returned the local TLS private key and began with `-----BEGIN PRIVATE KEY-----`.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (3)
CWE-73 External Control of File Name or Path
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/wwbn/avideo/CVE-2026-33354.yml
Reference id Reference type URL
https://github.com/WWBN/AVideo
59bbd601a3f65a5b18c1d9e4eb11471c0a59214f Other https://github.com/WWBN/AVideo/commit/59bbd601a3f65a5b18c1d9e4eb11471c0a59214f
CVE-2026-33354 https://nvd.nist.gov/vuln/detail/CVE-2026-33354
GHSA-4jw9-5hrc-m4j6 https://github.com/advisories/GHSA-4jw9-5hrc-m4j6
GHSA-4jw9-5hrc-m4j6 Other https://github.com/WWBN/AVideo/security/advisories/GHSA-4jw9-5hrc-m4j6
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/wwbn/avideo/CVE-2026-33354.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-25T14:12:12Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/33xxx/CVE-2026-33354.json

Source Advisory: vulnrichment/CVE-2026-33354

View SSVC decision tree 
[{'Exploitation': 'poc'},
 {'Automatable': 'no'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]