Back to overview

CVE-2026-48747

MEDIUM
6.3
CVSS 4.0
Description
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 7.4.13 and 8.0.13, MailomatRequestParser::validateSignature() parsed X-MOM-Webhook-Signature as algo=signature and passed the request-selected algorithm to hash_hmac(), allowing a signature algorithm downgrade instead of enforcing Mailomat's documented SHA-256 webhook signature. This issue is fixed in versions 7.4.13 and 8.0.13.

Metadata

CVE ID
CVE-2026-48747
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-05-22 19:10 UTC
Published
2026-07-14 19:16 UTC
Last updated
2026-07-14 19:16 UTC
Primary CWE
CWE-347
CWE-347: Improper Verification of Cryptographic Signature
Vendor / Product
symfony / symfony
Sources
cve.org  ·  NVD

Severity & Metrics

6.3 MEDIUM CVSS 4.0
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Affected products (2)
VendorProductPlatformVersions
symfony mailomat-mailer — >= 7.2.0, < 7.4.12, >= 8.0.0-BETA1, < 8.0.13
symfony symfony — >= 7.2.0, < 7.4.12, >= 8.0.0-BETA1, < 8.0.13
Weakness (CWE)
CWESourceDescription
CWE-347 cna CWE-347: Improper Verification of Cryptographic Signature
CWE-757 cna CWE-757: Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')
CVSS scores (1)
ScoreSeverityVersionSourceVector
6.3 MEDIUM 4.0 cna CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
References (4)
Back to overview