Vulnerability in Sensiolabs Symfony
CVE-2026-47767
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Sensiolabs Symfony
- Symfony Runtime — versions >= 5.4.46, < 5.4.52, >= 6.4.14, < 6.4.40, >= 7.1.7, < 7.4.12
- Symfony — versions >= 5.4.46, < 5.4.52, >= 6.4.14, < 6.4.40, >= 7.1.7, < 7.4.12
Weakness classification (CWE)
References
- github.com/symfony/symfony/security/advisories/GHSA-fqc7-9xjw-jrh3 (Not Applicable)
- github.com/symfony/symfony/commit/3228c3806ee511008bea19a95084d460b17e5d25 (Patch)
- github.com/symfony/symfony/releases/tag/v5.4.52 (Product, Release Notes)
- github.com/symfony/symfony/releases/tag/v6.4.40 (Product, Release Notes)
- github.com/symfony/symfony/releases/tag/v7.4.12 (Product, Release Notes)
- github.com/symfony/symfony/releases/tag/v8.0.12 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-47767?
- CVE-2026-47767 is a critical-severity vulnerability in Sensiolabs Symfony, classified under CWE-436. CVSS score: 9.8/10. Published 2026-07-14.
- How severe is CVE-2026-47767?
- Critical severity. CVSS v3 base score is 9.8 out of 10.