# CVE-2024-50340: Ability to change environment from query in symfony/runtime

- Exploited (CISA KEV): no
- Published: 2024-11-06
- CVSS: 7.3 HIGH (v3.1)
- EPSS: 61.8% (99th percentile)
- CWE: CWE-74

symfony/runtime is a module for the Symphony PHP framework which enables decoupling PHP applications from global state. When the `register_argv_argc` 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. As of versions 5.4.46, 6.4.14, and 7.1.7 the `SymfonyRuntime` now ignores the `argv` values for non-SAPI PHP runtimes. All users are advised to upgrade. There are no known workarounds for this vulnerability.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Blocks by default | 2025-01-06 | 61 |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2025-01-21 | 76 |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### Cloudflare

- 2025-01-06 · new · rule 84d481b1f49c4735afa2fb2bb615335e · default Block
  > Symfony Profiler - Auth Bypass - CVE:CVE-2024-50340. Previous action: Log. New action: Block. New Detection
  Source: https://developers.cloudflare.com/changelog/post/2025-01-06-waf-release/

### F5

- 2025-01-21 · new · rule 200014043
  > Added: signature 200014043 "Symfony Environment Change" (Abuse of Functionality, risk Medium), systems: PHP. References: CVE-2024-50340.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2025-03-11 · new · rule 200014043
  > Added: signature 200014043 "Symfony Environment Change" (Abuse of Functionality, risk Medium), systems: PHP. References: CVE-2024-50340.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

## Our test (measured)

- OWASP Core Rule Set 4.25.0, paranoia level 1, anomaly threshold 5, default CRS settings: passed (0 of 2 requests blocked), template CVE-2024-50340, 2026-11-02
- OWASP Core Rule Set 4.25.0, paranoia level 2, anomaly threshold 5, default CRS settings: passed (0 of 2 requests blocked), template CVE-2024-50340, 2026-11-02

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2024-50340 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2024-50340