CVE-2026-49208

Symfony UX is a JavaScript ecosystem for Symfony. From 2.8.0 until 2.36.0 and 3.1.0, when a #[LiveProp] is typed as DateTimeInterface and no explicit format is configured, Symfony\UX\LiveComponent\LiveComponentHydrator::hydrateObjectValue() falls back to new $className($value), allowing client-supplied relative strings such as now, tomorrow, or +10 years to move a writable, format-less date prop past time-based business logic checks. This issue is fixed in versions 2.36.0 and 3.1.0.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/symfony/ux/commit/d24d78fda6df2d5964312255943ebf3a217b79a2	Patch
https://github.com/symfony/ux/releases/tag/v2.36.0	Release Notes
https://github.com/symfony/ux/releases/tag/v3.1.0	Release Notes
https://github.com/symfony/ux/security/advisories/GHSA-89g7-22c8-3j23	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:symfony:ux::::::::
	cpe:2.3:a:symfony:ux:3.0.0:::::::*

History

20 Jul 2026, 16:57

Type	Values Removed	Values Added
First Time		Symfony Symfony ux
CPE		cpe:2.3:a:symfony:ux:3.0.0:::::::* cpe:2.3:a:symfony:ux::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.3
References	~~() https://github.com/symfony/ux/commit/d24d78fda6df2d5964312255943ebf3a217b79a2 -~~	() https://github.com/symfony/ux/commit/d24d78fda6df2d5964312255943ebf3a217b79a2 - Patch
References	~~() https://github.com/symfony/ux/releases/tag/v2.36.0 -~~	() https://github.com/symfony/ux/releases/tag/v2.36.0 - Release Notes
References	~~() https://github.com/symfony/ux/releases/tag/v3.1.0 -~~	() https://github.com/symfony/ux/releases/tag/v3.1.0 - Release Notes
References	~~() https://github.com/symfony/ux/security/advisories/GHSA-89g7-22c8-3j23 -~~	() https://github.com/symfony/ux/security/advisories/GHSA-89g7-22c8-3j23 - Vendor Advisory

17 Jul 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-17 17:17

Updated : 2026-07-21 03:16

NVD link : CVE-2026-49208

Mitre link : CVE-2026-49208

CVE.ORG link : CVE-2026-49208

JSON object : View

Products Affected

symfony

ux

CWE

CWE-20

Improper Input Validation

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