CVE-2026-35450: AVideo Unauthenticated FFmpeg Remote Server Status Vulnerability

MODERATE
Advisory Identifier: GHSA-2vg4-rrx4-qcpq
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CVSS 5.3
CWE-306
Published
Advisory Summary

CVE-2026-35450 is a MODERATE (CVSS 5.3) unauthenticated ffmpeg remote server status vulnerability (CWE-306: Missing Authentication for Critical Function) affecting AVideo libraries in the Packagist ecosystem. The issue involves unauthenticated ffmpeg remote server status disclosure via check.ffmpeg.json.php. Remediation is available in the latest vendor maintenance releases.

CVE-2026-35450 at a Glance

CVE Identifier CVE-2026-35450
GHSA Identifier GHSA-2vg4-rrx4-qcpq
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-306: Missing Authentication for Critical Function
Affected Product AVideo
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-35450

To remediate this vulnerability, upgrade all affected AVideo dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

wwbn/avideo fixed: Latest secure release 
Upgrade wwbn/avideo to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for wwbn/avideo

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-35450, inspect your project dependencies for AVideo:

inspect dependencies for wwbn/avideo

Analyze the terminal output to locate any version of AVideo in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-306: Missing Authentication for Critical Function, where the product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. In AVideo, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Summary The `plugin/API/check.ffmpeg.json.php` endpoint probes the FFmpeg remote server configuration and returns connectivity status without any authentication. All sibling FFmpeg management endpoints (`kill.ffmpeg.json.php`, `list.ffmpeg.json.php`, `ffmpeg.php`) require `User::isAdmin()`. ## Details The entire file at `plugin/API/check.ffmpeg.json.php`: ```php <?php $configFile = __DIR__.'/../../videos/configuration.php'; require_once $configFile; header('Content-Type: application/json'); $obj = testFFMPEGRemote(); die(json_encode($obj)); ``` No `User::isAdmin()`, `User::isLogged()`, or any access control check exists. Compare with sibling endpoints in the same directory: - `kill.ffmpeg.json.php` checks `User::isAdmin()` - `list.ffmpeg.json.php` checks `User::isAdmin()` ## Proof of Concept ```bash curl "https://your-avideo-instance.com/plugin/API/check.ffmpeg.json.php" ``` Returns information about whether the platform uses a standalone FFmpeg server and its current reachability. ## Impact Infrastructure reconnaissance revealing the encoding architecture. Limited direct impact but aids targeted attack planning. ## Recommended Fix Add an admin authentication check at `plugin/API/check.ffmpeg.json.php:3`, after `require_once $configFile;`: ```php if (!User::isAdmin()) { forbiddenPage('Admin only'); } ``` --- *Found by [aisafe.io](https://aisafe.io)*

CVE-2026-35450 Affected AVideo Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
wwbn/avideo
 Packagist
≤ 26.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/WWBN/AVideo/security/advisories/GHSA-2vg4-rrx4-qcpq
NVD — CVE-2026-35450 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35450
AVideo Source Repository REPOSITORY
https://github.com/WWBN/AVideo

Frequently Asked Questions

What is CVE-2026-35450?
CVE-2026-35450 is a security vulnerability in AVideo involving Unauthenticated FFmpeg Remote Server Status Disclosure via check.ffmpeg.json.php under CWE-306: Missing Authentication for Critical Function.
Which AVideo versions are affected?
Affected versions include releases prior to current release patches across affected packages: wwbn/avideo.
What version fixes CVE-2026-35450?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is wwbn/avideo affected?
Yes, wwbn/avideo is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-35450?
CVE-2026-35450 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2026-35450?
CVE-2026-35450 is classified under CWE-306: Missing Authentication for Critical Function (The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.).
How can I check Packagist dependencies for CVE-2026-35450?
Run the dependency tree command: 'inspect dependencies for wwbn/avideo'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2vg4-rrx4-qcpq",
  "modified" : "2026-04-07T14:20:51Z",
  "published" : "2026-04-04T06:16:49Z",
  "aliases" : [ "CVE-2026-35450" ],
  "summary" : "AVideo: Unauthenticated FFmpeg Remote Server Status Disclosure via check.ffmpeg.json.php",
  "details" : "## Summary\n\nThe `plugin/API/check.ffmpeg.json.php` endpoint probes the FFmpeg remote server configuration and returns connectivity status without any authentication. All sibling FFmpeg management endpoints (`kill.ffmpeg.json.php`, `list.ffmpeg.json.php`, `ffmpeg.php`) require `User::isAdmin()`.\n\n## Details\n\nThe entire file at `plugin/API/check.ffmpeg.json.php`:\n\n```php\n<?php\n$configFile = __DIR__.'/../../videos/configuration.php';\nrequire_once $configFile;\nheader('Content-Type: application/json');\n\n$obj = testFFMPEGRemote();\n\ndie(json_encode($obj));\n```\n\nNo `User::isAdmin()`, `User::isLogged()`, or any access control check exists.\n\nCompare with sibling endpoints in the same directory:\n- `kill.ffmpeg.json.php` checks `User::isAdmin()`\n- `list.ffmpeg.json.php` checks `User::isAdmin()`\n\n## Proof of Concept\n\n```bash\ncurl \"https://your-avideo-instance.com/plugin/API/check.ffmpeg.json.php\"\n```\n\nReturns information about whether the platform uses a standalone FFmpeg server and its current reachability.\n\n## Impact\n\nInfrastructure reconnaissance revealing the encoding architecture. Limited direct impact but aids targeted attack planning.\n\n## Recommended Fix\n\nAdd an admin authentication check at `plugin/API/check.ffmpeg.json.php:3`, after `require_once $configFile;`:\n\n```php\nif (!User::isAdmin()) {\n    forbiddenPage('Admin only');\n}\n```\n\n---\n*Found by [aisafe.io](https://aisafe.io)*",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "wwbn/avideo"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "26.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/WWBN/AVideo/security/advisories/GHSA-2vg4-rrx4-qcpq"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-35450"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/WWBN/AVideo"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-306" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-04T06:16:49Z",
    "nvd_published_at" : "2026-04-06T22:16:23Z"
  }
}