CVE-2026-48747: 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…

PriorityP430medium5.3CVSS 3.1

AVNACLPRNUINSUCNILAN

EPSS

0.20%

9.7th percentile

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.

Affected

10 ranges

Vendor	Product	Version range	Fixed in
sensiolabs	symfony	>= 7.2.0 < 7.4.13	7.4.13
sensiolabs	symfony	>= 8.0.0 < 8.0.13	8.0.13
symfony	mailomat-mailer	—	—
symfony	mailomat-mailer	—	—
symfony	mailomat-mailer	>= 7.2.0 < 7.4.13	7.4.13
symfony	mailomat-mailer	>= 8.0.0 < 8.0.13	8.0.13
symfony	symfony	—	—
symfony	symfony	—	—
symfony	symfony	>= 7.2.0 < 7.4.13	7.4.13
symfony	symfony	>= 8.0.0 < 8.0.13	8.0.13

CVSS provenance

nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

nvdv4.06.3MEDIUMCVSS:4.0/AV:N/AC:H/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

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