Symfony: Mailjet Mailer Webhook Parser Never Verifies the Configured Secret — Unauthenticated Webhook Event Injection

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-45754
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-14 19:17:07 UTC
Updated2026-07-16 03:12:34 UTC
DescriptionSymfony 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.

Risk And Classification

Primary CVSS: v4.0 6.9 MEDIUM from [email protected]

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: 0.004580000 probability, percentile 0.368820000 (date 2026-07-15)

Problem Types: CWE-287 | CWE-306 | CWE-287 CWE-287: Improper Authentication | CWE-306 CWE-306: Missing Authentication for Critical Function

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary6.9MEDIUMCVSS: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/C...
4.0CNADECLARED6.9MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
3.1[email protected]Primary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Sensiolabs Symfony All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Symfony Symfony affected >= 6.4.0, < 6.4.40 Not specified
CNA Symfony Symfony affected >= 7.0.0-BETA1, < 7.4.12 Not specified
CNA Symfony Symfony affected >= 8.0.0-BETA1, < 8.0.12 Not specified
CNA Symfony Lox24-notifier affected >= 7.1.0-BETA1, < 7.4.12 Not specified
CNA Symfony Lox24-notifier affected >= 8.0.0-BETA1, < 8.0.12 Not specified
CNA Symfony Mailjet-mailer affected >= 6.4.0, < 6.4.40 Not specified
CNA Symfony Mailjet-mailer affected >= 7.0.0-BETA1, < 7.4.12 Not specified
CNA Symfony Mailjet-mailer affected >= 8.0.0-BETA1, < 8.0.12 Not specified

References

ReferenceSourceLinkTags
github.com/symfony/symfony/commit/3e52bf5ab733ee32e35eeeeb2631d859c941838e [email protected] github.com Patch
github.com/symfony/symfony/security/advisories/GHSA-64hg-93w9-fc35 [email protected] github.com Patch, Vendor Advisory
github.com/symfony/symfony/releases/tag/v6.4.40 [email protected] github.com Release Notes
github.com/symfony/symfony/releases/tag/v8.0.12 [email protected] github.com Release Notes
github.com/symfony/symfony/commit/4aaa45dd054f73445f1ab254968b7e60b546cc77 [email protected] github.com Patch
github.com/symfony/symfony/releases/tag/v7.4.12 [email protected] github.com Release Notes
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report