Auth bypass in Sensiolabs Symfony
CVE-2026-47212
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 6.4.40, 7.4.12, and 8.0.12, TwilioRequestParser::doParse() received the configured webhook secret but ignored the X-Twilio-Signature HMAC header, allowing unauthenticated POST requests to inject forged Twilio status payloads. This issue is fixed in versions 6.4.40, 7.4.12, and 8.0.12.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.015 (73.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.015 · change: +0.012
Affected products
- Sensiolabs Symfony
- Symfony — versions >= 6.4.0, < 6.4.40, >= 7.0.0-BETA1, < 7.4.12, >= 8.0.0-BETA1, < 8.0.12
- Symfony Twilio-Notifier — versions >= 6.4.0, < 6.4.40, >= 7.0.0-BETA1, < 7.4.12, >= 8.0.0-BETA1, < 8.0.12
Weakness classification (CWE)
References
- github.com/symfony/symfony/security/advisories/GHSA-55rj-x2vc-4whq (Patch, Vendor Advisory)
- github.com/symfony/symfony/commit/8545fb2af6c07dfb5ef0fc8d9bccf86db2c94356 (Patch)
- 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-2026-47212?
- CVE-2026-47212 is a medium-severity vulnerability in Sensiolabs Symfony, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2026-07-14.
- How severe is CVE-2026-47212?
- Medium severity. CVSS v3 base score is 5.3 out of 10.