CVE-2026-34733
AVideo: Unauthenticated File Deletion via PHP Operator Precedence Bug in CLI Guard
Description
WWBN AVideo is an open source video platform. In versions 26.0 and prior, the AVideo installation script install/deleteSystemdPrivate.php contains a PHP operator precedence bug in its CLI-only access guard. The script is intended to run exclusively from the command line, but the guard condition !php_sapi_name() === 'cli' never evaluates to true due to how PHP resolves operator precedence. The ! (logical NOT) operator binds more tightly than === (strict comparison), causing the expression to always evaluate to false, which means the die() statement never executes. As a result, the script is accessible via HTTP without authentication and will delete files from the server's temp directory while also disclosing the temp directory contents in its response. At time of publication, there are no publicly available patches.
INFO
Published Date :
March 31, 2026, 9:16 p.m.
Last Modified :
July 24, 2026, 8:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Block HTTP access to install/deleteSystemdPrivate.php.
- Implement access controls for the script.
- Update AVideo once a patch is available.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-34733.
| URL | Resource |
|---|---|
| https://github.com/WWBN/AVideo/security/advisories/GHSA-wwpw-hrx8-79r5 | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-34733 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-34733
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-34733 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-34733 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 24, 2026
Action Type Old Value New Value Added Translation Title: AVideo de WWBN, Description: WWBN AVideo es una plataforma de video de código abierto. En las versiones 26.0 y anteriores, el script de instalación de AVideo install/deleteSystemdPrivate.php contiene un error de precedencia de operadores de PHP en su guardia de acceso solo para CLI. El script está diseñado para ejecutarse exclusivamente desde la línea de comandos, pero la condición de guardia !php_sapi_name() === 'cli' nunca se evalúa como verdadera debido a cómo PHP resuelve la precedencia de operadores. El operador ! (NOT lógico) se enlaza más fuertemente que === (comparación estricta), haciendo que la expresión siempre se evalúe como falsa, lo que significa que la declaración die() nunca se ejecuta. Como resultado, el script es accesible vía HTTP sin autenticación y eliminará archivos del directorio temporal del servidor mientras también divulga el contenido del directorio temporal en su respuesta. Al momento de la publicación, no hay parches disponibles públicamente. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'WWBN', 'product': 'AVideo', 'versions': [{'status': 'affected', 'version': '<= 26.0'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-34733', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-04-01T18:45:00.611846Z'} -
Initial Analysis by [email protected]
Apr. 01, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L Added CPE Configuration OR *cpe:2.3:a:wwbn:avideo:*:*:*:*:*:*:*:* versions up to (including) 26.0 Added Reference Type GitHub, Inc.: https://github.com/WWBN/AVideo/security/advisories/GHSA-wwpw-hrx8-79r5 Types: Exploit, Vendor Advisory -
New CVE Received by [email protected]
Mar. 31, 2026
Action Type Old Value New Value Added Description WWBN AVideo is an open source video platform. In versions 26.0 and prior, the AVideo installation script install/deleteSystemdPrivate.php contains a PHP operator precedence bug in its CLI-only access guard. The script is intended to run exclusively from the command line, but the guard condition !php_sapi_name() === 'cli' never evaluates to true due to how PHP resolves operator precedence. The ! (logical NOT) operator binds more tightly than === (strict comparison), causing the expression to always evaluate to false, which means the die() statement never executes. As a result, the script is accessible via HTTP without authentication and will delete files from the server's temp directory while also disclosing the temp directory contents in its response. At time of publication, there are no publicly available patches. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L Added CWE CWE-284 Added Reference https://github.com/WWBN/AVideo/security/advisories/GHSA-wwpw-hrx8-79r5