CVE-2026-45754
Symfony: Mailjet Mailer Webhook Parser Never Verifies the Configured Secret — Unauthenticated Webhook Event Injection
- 6.9MediumCVSS base score
- 0.45%Exploitation in 30 daysEPSS · top 61% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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, 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.
Timeline
ID reserved
By GitHub_M
- 2 months later
· 2 months later
Published
- 7 days later
· 7 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 4.0 | Medium6.9 | 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 |
| NVDNVD · Analyzed | 4.0 | Medium6.9 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.45% · top 61% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.9.
Affected products
- affected >= 6.4.0, < 6.4.40
- affected >= 7.0.0-BETA1, < 7.4.12
- affected >= 8.0.0-BETA1, < 8.0.12
- affected >= 7.1.0-BETA1, < 7.4.12
- affected >= 8.0.0-BETA1, < 8.0.12
- affected >= 6.4.0, < 6.4.40
- affected >= 7.0.0-BETA1, < 7.4.12
- affected >= 8.0.0-BETA1, < 8.0.12
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Packagistsymfony/lox24-notifierGHSA-64hg-93w9-fc35 (opens in a new tab)
- Packagistsymfony/mailjet-mailerGHSA-64hg-93w9-fc35 (opens in a new tab)
- Packagistsymfony/symfonyGHSA-64hg-93w9-fc35 (opens in a new tab)
References
References6
- https://github.com/symfony/symfony/security/advisories/GHSA-64hg-93w9-fc35 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/symfony/symfony/commit/3e52bf5ab733ee32e35eeeeb2631d859c941838e (opens in a new tab)x_refsource_MISC
- https://github.com/symfony/symfony/commit/4aaa45dd054f73445f1ab254968b7e60b546cc77 (opens in a new tab)x_refsource_MISC
- https://github.com/symfony/symfony/releases/tag/v6.4.40 (opens in a new tab)x_refsource_MISC
- https://github.com/symfony/symfony/releases/tag/v7.4.12 (opens in a new tab)x_refsource_MISC
- https://github.com/symfony/symfony/releases/tag/v8.0.12 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-44360 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-64hg-93w9-fc35 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-45754)Record last updated .