CVE-2026-33482 - AVideo has an OS Command Injection via $() Shell Substitution Bypass in sanitizeFFmpegCommand()

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HIGH

AVideo has an OS Command Injection via $() Shell Substitution Bypass in sanitizeFFmpegCommand()

Published Mar 23, 2026

8.1

HIGH

CVSS 3.1

EPSS 4.65%

Description

WWBN AVideo is an open source video platform. In versions up to and including 26.0, the `sanitizeFFmpegCommand()` function in `plugin/API/standAlone/functions.php` is designed to prevent OS command injection in ffmpeg commands by stripping dangerous shell metacharacters (`&&`, `;`, `|`, `` ` ``, `<`, `>`). However, it fails to strip `$()` (bash command substitution syntax). Since the sanitized command is executed inside a double-quoted `sh -c` context in `execAsync()`, an attacker who can craft a valid encrypted payload can achieve arbitrary command execution on the standalone encoder server. Commit 25c8ab90269e3a01fb4cf205b40a373487f022e1 contains a patch.

Affected products

Vendor WWBN Product AVideo Default
n/a
- Version
  <= 26.0
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

WWBN

AVideo

n/a

Version	Status	Constraints
<= 26.0	affected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-78

OS Command Injection

References (4)

https://github.com/WWBN/AVideo/commit/25c8ab90269e3a01fb4cf205b40a373487f022e1
x_refsource_MISCPatch
https://github.com/WWBN/AVideo/security/advisories/GHSA-pmj8-r2j7-xg6c
x_refsource_CONFIRMExploitMitigationVendor Advisory
https://github.com/advisories/GHSA-pmj8-r2j7-xg6c
Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-33482

Link	Providers	Tags
https://github.com/WWBN/AVideo/commit/25c8ab90269e3a01fb4cf205b40a373487f022e1		x_refsource_MISCPatch
https://github.com/WWBN/AVideo/security/advisories/GHSA-pmj8-r2j7-xg6c		x_refsource_CONFIRMExploitMitigationVendor Advisory
https://github.com/advisories/GHSA-pmj8-r2j7-xg6c		Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-33482