# CVE-2026-55173: WWBN AVideo OS command injection in sanitizeFFmpegCommand

Source: https://junglewise.ai/threats/cve-2026-55173-wwbn-avideo-os-command-injection-in-sanitizeffmpegcommand  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-16. Updated: 2026-07-16  
License: CC BY 4.0 with a link back

CVE-2026-55173 · Severity: high · CVSS 8.1 · Published 2026-07-16

WWBN AVideo, an open-source video platform, is vulnerable to a security flaw that allows attackers to execute unauthorized commands on the server. This occurs because the software fails to properly clean user-provided data before passing it to the system's command-line interface. An attacker could exploit this to gain full control over the video encoder server, potentially leading to data theft, service disruption, or the installation of malicious software.

Technologies: [wwbn/avideo (Packagist)](https://junglewise.ai/threats/technologies/wwbn-avideo), [WWBN AVideo](https://junglewise.ai/threats/technologies/avideo). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist), [WWBN](https://junglewise.ai/threats/vendors/wwbn).

## Quick answers

**Is CVE-2026-55173 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-55173 being exploited in the wild.

**How severe is CVE-2026-55173?** High severity, with a CVSS score of 8.1, published 16 July 2026.

**Which products and versions are affected?** wwbn/avideo (Packagist) <= 29.0, ECOSYSTEM:introduced=0,last_affected=29.0; WWBN AVideo <= 29.0.

**Is there a fix for CVE-2026-55173?** A patch was published on 2026-07-16: Fix committed to repository Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-55173 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-55173?** Check whether you run wwbn/avideo (Packagist) or WWBN AVideo at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An OS command injection vulnerability exists in WWBN AVideo versions 29.0 and below within the `sanitizeFFmpegCommand()` function in `plugin/API/standAlone/functions.php`. This is a regression/incomplete fix for CVE-2026-33482; while previous fixes blocked command substitution and double-ampersands, they failed to filter the single ampersand (&) shell background operator. The vulnerability is reachable via `ffmpeg.json.php`, which processes encrypted payloads from the `codeToExecEncrypted` parameter and passes them to an `execAsync()` call using `sh -c`. An attacker capable of crafting a valid encrypted payload can chain commands (e.g., using `& curl` or `& nc`) to achieve arbitrary code execution. A patch has been released in commit c1cfa2bea8a351a1d07f5758f82887403e3abf1f.

## Affected products

- WWBN AVideo <= 29.0

## Identifiers

- CVE-2026-55173
- GHSA-wc3f-xc32-435f

## Timeline

- 2026-06-10: advisory: GitHub Security Advisory GHSA-wc3f-xc32-435f published
- 2026-07-16: disclosed: CVE-2026-55173 published to NVD
- 2026-07-16: patched: Fix committed to repository

## References

- [https://github.com/WWBN/AVideo/commit/c1cfa2bea8a351a1d07f5758f82887403e3abf1f](https://github.com/WWBN/AVideo/commit/c1cfa2bea8a351a1d07f5758f82887403e3abf1f)
- [https://github.com/WWBN/AVideo/security/advisories/GHSA-wc3f-xc32-435f](https://github.com/WWBN/AVideo/security/advisories/GHSA-wc3f-xc32-435f)

## Related threats

- [WWBN AVideo stored cross-site scripting in channel feed](https://junglewise.ai/threats/cve-2026-126810-wwbn-avideo-29-1-0-through-29-7-1-contains-a-stored-cross-site)
- [WWBN AVideo missing authorization in import and file operations](https://junglewise.ai/threats/cve-2026-126809-wwbn-avideo-through-29-7-1-contains-a-missing-authorization)
- [WWBN AVideo stored cross-site scripting in video download link](https://junglewise.ai/threats/cve-2026-126806-wwbn-avideo-14-3-through-29-7-1-contains-a-stored-cross-site)
- [WWBN AVideo incorrect authorization in encoder endpoints](https://junglewise.ai/threats/cve-2026-126805-wwbn-avideo-through-29-7-1-contains-an-incorrect-authorization)
- [WWBN AVideo path traversal in ADs plugin deleteImage.json.php](https://junglewise.ai/threats/cve-2026-126804-wwbn-avideo-12-4-through-29-7-1-contains-a-path-traversal)