CVE-2024-50340
Exploitation confirmed. First attested on 2026-09-10 by GCVE · previdian, GCVE · shadowserver.
- Published2024-11-06
- Fixed in7.1.7 · 6.4.14 · 5.4.46
- WeaknessCWE-74
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
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.
Timeline
dates in UTC- 2024-11-0621:15CVE publishedNVD
- 2026-09-10Listed as exploited by GCVEGCVE
- 2026-09-10Exploitation first reportedGCVE
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-50340?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-50340?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
CISA-ADP| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 7.x | ≥ 7.0.0, < 7.1.7 | 7.1.7 | CISA-ADP |
| 6.x | ≥ 6.0.0, < 6.4.14 | 6.4.14 | CISA-ADP |
| 5.4 | < 5.4.46 | 5.4.46 | CISA-ADP |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Symfony to 7.1.7 · 6.4.14 · 5.4.46
Detection
read 2026-10-23 19:24 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
Sources
- NVDCVE recordread 2026-10-23
- GCVEexploitation2026-09-10
- CISA-ADPSSVC decisionnone2024-11-07
- OpenCVESSVC decisionnone—
- CNACVSS 3.17.3read 2026-10-23
- CNAweakness (CWE)CWE-74read 2026-10-23
- FIRST EPSSEPSS score63.6 %read 2026-10-23
- PoC-in-GitHubproof of concept1read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- Published
- 2024-11-06
- Last Modified
- 2026-06-17
- NVD status
- Deferred
Frequently asked questions
What is CVE-2024-50340?
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What is the CVSS score for CVE-2024-50340?
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