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CVE-2026-47767Symfony: SymfonyRuntime CVE-2024-50340 Patch Bypass: Web Requests Can Still Set APP_ENV/APP_DEBUG via parse_str/SAPI Argv Mismatch
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 5.4.46 until 5.4.52, 6.4.40, 7.4.12, and 8.0.12, the CVE-2024-50340 fix gated runtime argv parsing on empty($_GET), but parse_str() and the web SAPI can disagree, allowing a crafted query string to leave $_GET empty while $_SERVER['argv'] still carries attacker-controlled --env or --no-debug flags that change APP_ENV or APP_DEBUG. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
8.3 HIGHEPSS 0.72%Not in KEVNVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 8.3 | HIGH | 4.0GitHub_M (CNA) | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N |
| 9.8 | CRITICAL | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Details
- CVE ID
- CVE-2026-47767
- Status
- Analyzed
- Assigner (CNA)
- GitHub_M
- Published
- Jul 14, 2026
- Last modified
- 2026-07-16 15:16 UTC
- Weaknesses
- CWE-436 · Interpretation Conflict
Affected Products
As published by the CNA in the CVE record.
symfonysymfony4 version ranges
- >= 5.4.46, < 5.4.52
- >= 6.4.14, < 6.4.40
- >= 7.1.7, < 7.4.12
- >= 8.0.0-BETA1, < 8.0.12
symfonyruntime4 version ranges
- >= 5.4.46, < 5.4.52
- >= 6.4.14, < 6.4.40
- >= 7.1.7, < 7.4.12
- >= 8.0.0-BETA1, < 8.0.12
References
- github.com https://github.com/symfony/symfony/commit/3228c3806ee511008bea19a95084d460b17e5d25
- github.com https://github.com/symfony/symfony/releases/tag/v5.4.52
- github.com https://github.com/symfony/symfony/releases/tag/v6.4.40
- github.com https://github.com/symfony/symfony/releases/tag/v7.4.12
- github.com https://github.com/symfony/symfony/releases/tag/v8.0.12
- github.com https://github.com/symfony/symfony/security/advisories/GHSA-fqc7-9xjw-jrh3