CVE-2026-48747

EUVD-2026-44375
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 15.74%
Affected Products (NVD)
VendorProductVersion
sensiolabssymfony
7.2.0 ≤
𝑥
< 7.4.13
sensiolabssymfony
8.0.0 ≤
𝑥
< 8.0.13
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
symfony
bookworm
5.4.53+dfsg-0+deb12u1
fixed
bookworm (security)
5.4.53+dfsg-0+deb12u1
fixed
bullseye
4.4.19+dfsg-2+deb11u6
fixed
bullseye (security)
4.4.19+dfsg-2+deb11u7
fixed
forky
7.4.16+dfsg-1
fixed
sid
7.4.16+dfsg-1
fixed
trixie
6.4.41+dfsg-0+deb13u1
fixed
trixie (security)
6.4.41+dfsg-0+deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
symfony
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
xenial
needs-triage
Common Weakness Enumeration
References
https://github.com/symfony/symfony/commit/bdfe9fe0d94d33dfaca0bc2fe0b00b54767b0c88
https://github.com/symfony/symfony/releases/tag/v7.4.13
https://github.com/symfony/symfony/releases/tag/v8.0.13
https://github.com/symfony/symfony/security/advisories/GHSA-rrj9-5q2j-4gvr