Symfony allows changing the environment through a query
Description
When the register_argc_argv php directive is set to on , and users call any URL with a special crafted query string, they are able to change the environment or debug mode used by the kernel when handling the request.
Resolution
The SymfonyRuntime now ignores the argv values for non-cli SAPIs PHP runtimes
The patch for this issue is available here for branch 5.4.
Credits
We would like to thank Vladimir Dusheyko for reporting the issue and Wouter de Jong for providing the fix.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | symfony/runtime | >= 5.3.0, < 5.4.46, >= 6.0.0, < 6.4.14, >= 7.0.0, < 7.1.7 | 5.4.46, 6.4.14, 7.1.7 |
| Composer package | symfony/symfony | >= 5.3.0, < 5.4.46, >= 6.0.0, < 6.4.14, >= 7.0.0, < 7.1.7 | 5.4.46, 6.4.14, 7.1.7 |
References
- https://github.com/symfony/symfony/security/advisories/GHSA-x8vp-gf4q-mw5j
- https://nvd.nist.gov/vuln/detail/CVE-2024-50340
- https://github.com/symfony/symfony/commit/a77b308c3f179ed7c8a8bc295f82b2d6ee3493fa
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/runtime/CVE-2024-50340.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2024-50340.yaml
- https://github.com/symfony/symfony
- https://symfony.com/cve-2024-50340
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L- Weakness (CWE)
CWE-20, CWE-74- Platform
- Composer
- Package
symfony/runtime, symfony/symfony- Disclosed
- 06.11.2024
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-x8vp-gf4q-mw5j - CC BY 4.0
Vulnerability history: symfony/runtime
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 11.2024 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 2
Disclosures per year
- 2024: 1
- 2025: 0
- 2026: 1
-
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