Vulnerability · Published Jul 14, 2026 · Assigned by GitHub_M
CVE-2026-47212Symfony: Twilio Notifier Webhook Parser Never Verifies the X-Twilio-Signature HMAC: Unauthenticated Webhook Event Injection
Medium 6.9
In plain English
A medium-severity missing authentication in symfony from symfony. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 74% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | symfony | 6.4.41+dfsg-0+deb13u1 | DEBIAN-CVE-2026-47212 |
| Debian:14 | symfony | 7.4.12+dfsg-1 | DEBIAN-CVE-2026-47212 |
| Packagist | symfony/symfony | 6.4.40 | GHSA-55rj-x2vc-4whq |
| Packagist | symfony/symfony | 7.4.12 | GHSA-55rj-x2vc-4whq |
| Packagist | symfony/symfony | 8.0.12 | GHSA-55rj-x2vc-4whq |
| Packagist | symfony/twilio-notifier | 8.0.12 | GHSA-55rj-x2vc-4whq |
| Packagist | symfony/twilio-notifier | 6.4.40 | GHSA-55rj-x2vc-4whq |
| Packagist | symfony/twilio-notifier | 7.4.12 | GHSA-55rj-x2vc-4whq |
| Ubuntu:25.10 | symfony | no fix listed | UBUNTU-CVE-2026-47212 |
| Ubuntu:26.04:LTS | symfony | no fix listed | UBUNTU-CVE-2026-47212 |
| Ubuntu:26.10 | symfony | no fix listed | UBUNTU-CVE-2026-47212 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| symfony | symfony | >= 6.4.0, < 6.4.40>= 7.0.0-BETA1, < 7.4.12>= 8.0.0-BETA1, < 8.0.12 |
| symfony | twilio-notifier | >= 6.4.0, < 6.4.40>= 7.0.0-BETA1, < 7.4.12>= 8.0.0-BETA1, < 8.0.12 |
Weakness: CWE-306, CWE-347 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/symfony/symfony/security/advisories/GHSA-55rj-x2vc-4whq x_refsource_CONFIRM
- https://github.com/symfony/symfony/commit/8545fb2af6c07dfb5ef0fc8d9bccf86db2c94356 x_refsource_MISC
- https://github.com/symfony/symfony/releases/tag/v6.4.40 x_refsource_MISC
- https://github.com/symfony/symfony/releases/tag/v7.4.12 x_refsource_MISC
- https://github.com/symfony/symfony/releases/tag/v8.0.12 x_refsource_MISC