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CVE-2026-49208

Symfony UX: Format-less date LiveProps parsed with the permissive DateTime constructor

Published: Jul 17, 2026Updated: Jul 21, 2026 Sources: CVE List NVDCWE-20
5.3MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 84.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-20

Affected Products

symfony
oss-projectaka symfony framework, twig (related)
uxLibrary
OSS Libraries / web-framework

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
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References

https://github.com/symfony/ux/commit/d24d78fda6df2d5964312255943ebf3a217b79a2
github.com
https://github.com/symfony/ux/releases/tag/v2.36.0
github.com
https://github.com/symfony/ux/releases/tag/v3.1.0
github.com
and 1 more references View all →

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