CVE-2026-48784: Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.53, 6.4.41, 7.4.13, and 8.0.13…

PriorityP432medium6.1CVSS 3.1

AVNACLPRNUIRSCCLILAN

EPSS

0.27%

18.5th percentile

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.53, 6.4.41, 7.4.13, and 8.0.13, UrlGenerator::doGenerate() used strtr() dot-segment encoding that skipped every other chained ../ or ./ segment, allowing attacker-controlled route parameters to generate URLs that collapse to a different path under RFC 3986 normalization. This issue is fixed in versions 5.4.53, 6.4.41, 7.4.13, and 8.0.13.

Affected

20 ranges

Vendor	Product	Version range	Fixed in
sensiolabs	symfony	< 5.4.53	5.4.53
sensiolabs	symfony	>= 6.0.0 < 6.4.41	6.4.41
sensiolabs	symfony	>= 7.0.0 < 7.4.13	7.4.13
sensiolabs	symfony	>= 8.0.0 < 8.0.13	8.0.13
symfony	routing	< 5.4.53	5.4.53
symfony	routing	—	—
symfony	routing	—	—
symfony	routing	—	—
symfony	routing	>= 0 < 5.4.53	5.4.53
symfony	routing	>= 6.0.0 < 6.4.41	6.4.41
symfony	routing	>= 7.0.0 < 7.4.13	7.4.13
symfony	routing	>= 8.0.0 < 8.0.13	8.0.13
symfony	symfony	< 5.4.53	5.4.53
symfony	symfony	—	—
symfony	symfony	—	—
symfony	symfony	—	—
symfony	symfony	>= 0 < 5.4.53	5.4.53
symfony	symfony	>= 6.0.0 < 6.4.41	6.4.41
symfony	symfony	>= 7.0.0 < 7.4.13	7.4.13
symfony	symfony	>= 8.0.0 < 8.0.13	8.0.13

CVSS provenance

nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

nvdv4.05.1MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/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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