CVE-2026-47212

Symfony: Twilio Notifier Webhook Parser Never Verifies the X-Twilio-Signature HMAC: Unauthenticated Webhook Event Injection

Published: Jul 14, 2026Updated: Jul 15, 2026 Sources: CVE List NVDCWE-306

5.3MEDIUM

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:LIntegrity

Low

A:NAvailability

None

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Weaknesses

CWE-306 CWE-347

Affected Products

symfony

oss-projectaka twig (related), symfony framework

symfonyLibrary

OSS Libraries / web-framework

twilio-notifierLibrary

OSS Libraries / web-framework

sensiolabs

oss-project

symfonyLibraryLibrary

OSS Libraries / generic-library

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

3 techniques

Collection

Initial Access

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References

https://github.com/symfony/symfony/security/advisories/GHSA-55rj-x2vc-4whq

github.com

https://github.com/symfony/symfony/commit/8545fb2af6c07dfb5ef0fc8d9bccf86db2c94356

github.com

https://github.com/symfony/symfony/releases/tag/v6.4.40

github.com

and 2 more references View all →

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