CVE-2026-45754
CVE-2026-45754 · Symfony: Mailjet Mailer Webhook Parser Never Verifies the Configured Secret — Unauthenticated Webhook Event Injection
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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, the Mailjet mailer bridge and LOX24 notifier bridge webhook parsers received configured webhook secrets but did not verify them, allowing unauthenticated POST requests to inject forged Mailjet and LOX24 event payloads. This issue is fixed in versions 6.4.40, 7.4.12, and 8.0.12.
CVSS 6.9 · Medium · EPSS 0.4% · Fix available
- Published
- Updated
Affected products and versions
symfony
- Versions
- >= 6.4.0, < 6.4.40: Affected
- >= 7.0.0-BETA1, < 7.4.12: Affected
- >= 8.0.0-BETA1, < 8.0.12: Affected
No fix published
lox24-notifier
- Versions
- >= 7.1.0-BETA1, < 7.4.12: Affected
- >= 8.0.0-BETA1, < 8.0.12: Affected
No fix published
mailjet-mailer
- Versions
- >= 6.4.0, < 6.4.40: Affected
- >= 7.0.0-BETA1, < 7.4.12: Affected
- >= 8.0.0-BETA1, < 8.0.12: Affected
No fix published
symfony Debian:13
- Versions
- 6.4.21+dfsg-2
- 6.4.21+dfsg-2+deb13u1
- 6.4.24+dfsg-1
- 6.4.25+dfsg-1
- 6.4.40+dfsg-0+deb13u1
- Affected ranges
- ECOSYSTEM: < 6.4.41+dfsg-0+deb13u1
Update to 6.4.41+dfsg-0+deb13u1
symfony Debian:14
- Versions
- 6.4.21+dfsg-2
- 6.4.24+dfsg-1
- 6.4.25+dfsg-1
- 7.0.4+dfsg-1
- 7.0.5+dfsg-1
- 7.0.6+dfsg-1
- 7.0.7+dfsg-1
- 7.1.0~beta1+dfsg-1
- 7.1.0~rc1+dfsg-1
- 7.1.2+dfsg-1
- 7.1.3+dfsg-1
- 7.1.4+dfsg-1
- 7.1.5+dfsg-1
- 7.2.0~beta1+dfsg-1
- 7.2.0~beta2+dfsg-1
- 7.2.0~rc1+dfsg-1
- 7.2.1+dfsg-1
- 7.2.2+dfsg-1
- 7.2.3+dfsg-1
- 7.2.4+dfsg-1
- 7.2.5+dfsg-1
- 7.2.6-1
- 7.3.0+dfsg-1
- 7.3.0~beta1+dfsg-1
- 7.3.0~beta2+dfsg-1
- 7.3.0~rc1+dfsg-1
- 7.3.1+dfsg-1
- 7.3.2+dfsg-1
- 7.3.3+dfsg-1
- 7.3.4+dfsg-1
- 7.3.5-1
- 7.4.0+dfsg-1
- 7.4.0+dfsg-2
- 7.4.0~beta1-1
- 7.4.0~beta1-2
- 7.4.0~beta2+dfsg-1
- 7.4.0~beta2+dfsg-2
- 7.4.0~beta2+dfsg-3
- 7.4.0~rc1+dfsg-1
- 7.4.0~rc2+dfsg-1
- 7.4.0~rc3+dfsg-1
- 7.4.10+dfsg-1
- 7.4.2+dfsg-1
- 7.4.2+dfsg-2
- 7.4.3+dfsg-1
- 7.4.4+dfsg-1
- 7.4.5+dfsg-1
- 7.4.6+dfsg-1
- 7.4.6+dfsg-2
- 7.4.7+dfsg-1
- 7.4.8+dfsg-1
- 7.4.9+dfsg-1
- Affected ranges
- ECOSYSTEM: < 7.4.12+dfsg-1
Update to 7.4.12+dfsg-1
symfony/lox24-notifier Packagist
- Versions
- v7.1.0
- v7.1.1
- v7.1.2
- v7.1.5
- v7.1.6
- v7.2.0
- v7.2.0-BETA1
- v7.2.0-RC1
- v7.2.9
- v7.3.0
- v7.3.0-BETA1
- v7.3.0-RC1
- v7.3.10
- v7.3.2
- v7.3.4
- v7.4.0
- v7.4.0-BETA1
- v7.4.0-RC1
- v7.4.4
- Affected ranges
- ECOSYSTEM: ≥ 7.1.0, < 7.4.12
Update to 7.4.12
symfony/lox24-notifier Packagist
- Versions
- v8.0.0
- v8.0.4
- Affected ranges
- ECOSYSTEM: ≥ 8.0.0, < 8.0.12
Update to 8.0.12
symfony/symfony Packagist
- Versions
- v6.4.0
- v6.4.1
- v6.4.10
- v6.4.11
- v6.4.12
- v6.4.13
- v6.4.14
- v6.4.15
- v6.4.16
- v6.4.17
- v6.4.18
- v6.4.19
- v6.4.2
- v6.4.20
- v6.4.21
- v6.4.22
- v6.4.23
- v6.4.24
- v6.4.25
- v6.4.26
- v6.4.27
- v6.4.28
- v6.4.29
- v6.4.3
- v6.4.30
- v6.4.31
- v6.4.32
- v6.4.33
- v6.4.34
- v6.4.35
- v6.4.36
- v6.4.37
- v6.4.38
- v6.4.39
- v6.4.4
- v6.4.5
- v6.4.6
- v6.4.7
- v6.4.8
- v6.4.9
- Affected ranges
- ECOSYSTEM: ≥ 6.4.0, < 6.4.40
Update to 6.4.40
symfony/symfony Packagist
- Versions
- v7.0.0
- v7.0.1
- v7.0.10
- v7.0.2
- v7.0.3
- v7.0.4
- v7.0.5
- v7.0.6
- v7.0.7
- v7.0.8
- v7.0.9
- v7.1.0
- v7.1.0-BETA1
- v7.1.0-RC1
- v7.1.1
- v7.1.10
- v7.1.11
- v7.1.2
- v7.1.3
- v7.1.4
- v7.1.5
- v7.1.6
- v7.1.7
- v7.1.8
- v7.1.9
- v7.2.0
- v7.2.0-BETA1
- v7.2.0-BETA2
- v7.2.0-RC1
- v7.2.1
- v7.2.2
- v7.2.3
- v7.2.4
- v7.2.5
- v7.2.6
- v7.2.7
- v7.2.8
- v7.2.9
- v7.3.0
- v7.3.0-BETA1
- v7.3.0-BETA2
- v7.3.0-RC1
- v7.3.1
- v7.3.10
- v7.3.11
- v7.3.2
- v7.3.3
- v7.3.4
- v7.3.5
- v7.3.6
- v7.3.7
- v7.3.8
- v7.3.9
- v7.4.0
- v7.4.0-BETA1
- v7.4.0-BETA2
- v7.4.0-RC1
- v7.4.0-RC2
- v7.4.0-RC3
- v7.4.1
- v7.4.10
- v7.4.11
- v7.4.2
- v7.4.3
- v7.4.4
- v7.4.5
- v7.4.6
- v7.4.7
- v7.4.8
- v7.4.9
- Affected ranges
- ECOSYSTEM: ≥ 7.0.0, < 7.4.12
Update to 7.4.12
symfony/symfony Packagist
- Versions
- v8.0.0
- v8.0.1
- v8.0.10
- v8.0.11
- v8.0.2
- v8.0.3
- v8.0.4
- v8.0.5
- v8.0.6
- v8.0.7
- v8.0.8
- v8.0.9
- Affected ranges
- ECOSYSTEM: ≥ 8.0.0, < 8.0.12
Update to 8.0.12
symfony/mailjet-mailer Packagist
- Versions
- v6.4.0
- v6.4.13
- v6.4.2
- v6.4.24
- v6.4.27
- v6.4.3
- v6.4.34
- v6.4.35
- v6.4.7
- v6.4.8
- Affected ranges
- ECOSYSTEM: ≥ 6.4.0, < 6.4.40
Update to 6.4.40
symfony/mailjet-mailer Packagist
- Versions
- v7.0.0
- v7.0.2
- v7.0.3
- v7.0.7
- v7.0.8
- v7.1.0
- v7.1.0-BETA1
- v7.1.0-RC1
- v7.1.1
- v7.1.6
- v7.2.0
- v7.2.0-BETA1
- v7.2.0-RC1
- v7.3.0
- v7.3.0-BETA1
- v7.3.0-RC1
- v7.3.5
- v7.4.0
- v7.4.0-BETA1
- v7.4.0-RC1
- v7.4.6
- v7.4.7
- Affected ranges
- ECOSYSTEM: ≥ 7.0.0, < 7.4.12
Update to 7.4.12
symfony/mailjet-mailer Packagist
- Versions
- v8.0.0
- v8.0.6
- v8.0.7
- Affected ranges
- ECOSYSTEM: ≥ 8.0.0, < 8.0.12
Update to 8.0.12
symfony Ubuntu:16.04:LTS
- Versions
- 2.7.1+dfsg-1
- 2.7.5+dfsg-1
- 2.7.9+dfsg-1
- 2.7.9+dfsg-1ubuntu2
- 2.7.10-0ubuntu2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
symfony Ubuntu:Pro:18.04:LTS
- Versions
- 2.8.7+dfsg-1.3ubuntu1
- 3.4.3+dfsg-1ubuntu4
- 3.4.6+dfsg-1
- 3.4.6+dfsg-1ubuntu0.1
- 3.4.6+dfsg-1ubuntu0.1+esm1
- 3.4.6+dfsg-1ubuntu0.1+esm2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
symfony Ubuntu:Pro:20.04:LTS
- Versions
- 4.3.4+dfsg-1ubuntu1
- 4.3.8+dfsg-1ubuntu1
- 4.3.8+dfsg-1ubuntu1+esm1
- 4.3.8+dfsg-1ubuntu1+esm2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
symfony Ubuntu:Pro:22.04:LTS
- Versions
- 5.2.6+dfsg-1ubuntu7
- 5.4.4+dfsg-1ubuntu8
- 5.4.4+dfsg-1ubuntu8+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
symfony Ubuntu:Pro:24.04:LTS
- Versions
- 5.4.23+dfsg-1ubuntu1
- 5.4.35+dfsg-3ubuntu1
- 6.4.5+dfsg-3ubuntu2
- 6.4.5+dfsg-3ubuntu3
- 6.4.5+dfsg-3ubuntu3+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
symfony Ubuntu:25.10
- Versions
- 6.4.18+dfsg-1ubuntu1
- 6.4.21+dfsg-2
- 6.4.21+dfsg-2ubuntu1
- 6.4.24+dfsg-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
symfony Ubuntu:26.10
- Versions
- 7.4.7+dfsg-1ubuntu1
- 7.4.9+dfsg-1ubuntu1
- 7.4.13+dfsg-2ubuntu1
- 7.4.14+dfsg-1ubuntu2
- 7.4.15+dfsg-2ubuntu2
- 7.4.16+dfsg-1ubuntu2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
symfony Ubuntu:26.04:LTS
- Versions
- 6.4.24+dfsg-1
- 7.4.5+dfsg-1ubuntu1
- 7.4.6+dfsg-2ubuntu1
- 7.4.7+dfsg-1ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
Original sources
- https://github.com/symfony/symfony/security/advisories/GHSA-64hg-93w9-fc35
- https://github.com/symfony/symfony/commit/3e52bf5ab733ee32e35eeeeb2631d859c941838e
- https://github.com/symfony/symfony/commit/4aaa45dd054f73445f1ab254968b7e60b546cc77
- https://github.com/symfony/symfony/releases/tag/v6.4.40
- https://github.com/symfony/symfony/releases/tag/v7.4.12
- https://github.com/symfony/symfony/releases/tag/v8.0.12
- https://nvd.nist.gov/vuln/detail/CVE-2026-45754