CVE-2026-45755

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 7.4.12 and 8.0.12, MailtrapRequestParser::doParse() received the configured webhook secret but ignored the X-Mt-Signature HMAC header, allowing unauthenticated POST requests to inject forged Mailtrap delivery, bounce, open, click, or spam events. This issue is fixed in versions 7.4.12 and 8.0.12.

• CWE-306
• CWE-347

• https://github.com/symfony/symfony/commit/4e0467e4e182cf2e704a3d9e1bc1a6be65d52ab8Patch
• https://github.com/symfony/symfony/releases/tag/v7.4.12Product, Release Notes
• https://github.com/symfony/symfony/releases/tag/v8.0.12Product, Release Notes
• https://github.com/symfony/symfony/security/advisories/GHSA-59f3-vp2f-mp9wPatch, Vendor Advisory

Published

Jul 14, 2026

Last Modified

Jul 15, 2026

Status

Analyzed

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