CVE-2026-29058: Wwbn/avideo WWBN AVideo Is Vulnerable To Vulnerability

CRITICAL
Advisory Identifier: GHSA-9j26-99jh-v26q
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CVSS 9.8
CWE-78
Published
Advisory Summary

CVE-2026-29058 is a CRITICAL (CVSS 9.8) wwbn avideo is vulnerable to vulnerability (CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')) affecting Wwbn/avideo libraries in the Packagist ecosystem. The issue involves wwbn avideo is vulnerable to unauthenticated os command injection via base64url in objects/getimage.php. Remediation is available by upgrading affected packages to version 7.0.0.

CVE-2026-29058 at a Glance

CVE Identifier CVE-2026-29058
GHSA Identifier GHSA-9j26-99jh-v26q
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Product Wwbn/avideo
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:H/I:H/A:H).

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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-29058

To remediate this vulnerability, upgrade all affected Wwbn/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: 7.0.0 
Upgrade wwbn/avideo to 7.0.0
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-2026-29058, inspect your project dependencies for Wwbn/avideo:

inspect dependencies for wwbn/avideo

Analyze the terminal output to locate any version of Wwbn/avideo in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 7.0.0), 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-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'), where the product constructs all or part of an os command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended os command when it is sent to a downstream component. In Wwbn/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

## Impact An unauthenticated attacker can execute arbitrary OS commands on the server by injecting shell command substitution into the `base64Url` GET parameter. This can lead to full server compromise, data exfiltration (e.g., configuration secrets, internal keys, credentials), and service disruption. ## Root Cause The `base64Url` parameter is Base64-decoded and then interpolated directly into a double-quoted `ffmpeg` shell command without proper shell escaping. The upstream validation uses `FILTER_VALIDATE_URL`, which validates URL syntax but does not prevent shell metacharacters / command substitution sequences from being interpreted by the shell. ## Affected Components * `objects/getImage.php` * `objects/security.php` * Execution path via async command execution helper (`shell_exec`/`nohup`) ## Patches Apply strict shell argument escaping (e.g., `escapeshellarg()`) to all user-supplied values before building any shell command, and avoid double-quoted interpolation of untrusted input. Prefer safer process execution patterns where possible. ## Workarounds * Restrict access to `objects/getImage.php` at the web server / reverse proxy layer (IP allowlist, auth, or disable endpoint if not needed). * Apply WAF rules to block suspicious patterns and limit exposure until a patch is deployed. ## Resources * Report: "Unauthenticated OS Command Injection in AVideo-Encoder"

CVE-2026-29058 Affected Wwbn/avideo Versions

1 component(s)
Fixed Versions:
7.0.0
Product / Package Ecosystem Affected Versions Fixed Version
wwbn/avideo
 Packagist
< 7.0.0
7.0.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/WWBN/AVideo-Encoder/security/advisories/GHSA-9j26-99jh-v26q
NVD — CVE-2026-29058 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-29058
Wwbn/avideo Source Repository REPOSITORY
https://github.com/WWBN/AVideo-Encoder

Frequently Asked Questions

What is CVE-2026-29058?
CVE-2026-29058 is a security vulnerability in Wwbn/avideo involving WWBN AVideo is vulnerable to unauthenticated OS Command Injection via base64Url in objects/getImage.php under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection').
Which Wwbn/avideo versions are affected?
Affected versions include releases prior to 7.0.0 across affected packages: wwbn/avideo.
What version fixes CVE-2026-29058?
Upgrading to 7.0.0 (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 7.0.0. Upgrade your dependency to 7.0.0 or later.
What is the CVSS score of CVE-2026-29058?
CVE-2026-29058 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-29058?
CVE-2026-29058 is classified under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') (The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.).
How can I check Packagist dependencies for CVE-2026-29058?
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-9j26-99jh-v26q",
  "modified" : "2026-03-06T21:56:49Z",
  "published" : "2026-03-03T20:02:40Z",
  "aliases" : [ "CVE-2026-29058" ],
  "summary" : "WWBN AVideo is vulnerable to unauthenticated OS Command Injection via base64Url in objects/getImage.php",
  "details" : "## Impact\n\nAn unauthenticated attacker can execute arbitrary OS commands on the server by injecting shell command substitution into the `base64Url` GET parameter. This can lead to full server compromise, data exfiltration (e.g., configuration secrets, internal keys, credentials), and service disruption.\n\n## Root Cause\n\nThe `base64Url` parameter is Base64-decoded and then interpolated directly into a double-quoted `ffmpeg` shell command without proper shell escaping. The upstream validation uses `FILTER_VALIDATE_URL`, which validates URL syntax but does not prevent shell metacharacters / command substitution sequences from being interpreted by the shell.\n\n## Affected Components\n\n* `objects/getImage.php`\n* `objects/security.php`\n* Execution path via async command execution helper (`shell_exec`/`nohup`)\n\n## Patches\n\nApply strict shell argument escaping (e.g., `escapeshellarg()`) to all user-supplied values before building any shell command, and avoid double-quoted interpolation of untrusted input. Prefer safer process execution patterns where possible.\n\n## Workarounds\n\n* Restrict access to `objects/getImage.php` at the web server / reverse proxy layer (IP allowlist, auth, or disable endpoint if not needed).\n* Apply WAF rules to block suspicious patterns and limit exposure until a patch is deployed.\n\n## Resources\n\n* Report: \"Unauthenticated OS Command Injection in AVideo-Encoder\"",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "wwbn/avideo"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "7.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/WWBN/AVideo-Encoder/security/advisories/GHSA-9j26-99jh-v26q"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-29058"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/WWBN/AVideo-Encoder"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-78" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-03T20:02:40Z",
    "nvd_published_at" : "2026-03-06T07:16:02Z"
  }
}