Medium severity5.3NVD Advisory· Published Jul 17, 2026· Updated Jul 21, 2026
CVE-2026-49208
CVE-2026-49208
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
symfony/ux-live-componentPackagist | >= 2.8.0, < 2.36.0 | 2.36.0 |
symfony/ux-live-componentPackagist | >= 3.0.0, < 3.1.0 | 3.1.0 |
Affected products
32.8.0 <= 2.36.0, 3.1.0+ 2 more
- (no CPE)range: 2.8.0 <= 2.36.0, 3.1.0
- cpe:2.3:a:symfony:ux:*:*:*:*:*:*:*:*range: >=2.8.0,<2.36.0
- cpe:2.3:a:symfony:ux:3.0.0:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
6- github.com/symfony/ux/commit/d24d78fda6df2d5964312255943ebf3a217b79a2nvdPatchWEB
- github.com/advisories/GHSA-89g7-22c8-3j23ghsaADVISORY
- github.com/symfony/ux/security/advisories/GHSA-89g7-22c8-3j23nvdVendor AdvisoryWEB
- github.com/FriendsOfPHP/security-advisories/blob/master/symfony/ux-live-component/CVE-2026-49208.yamlghsaWEB
- github.com/symfony/ux/releases/tag/v2.36.0nvdRelease Notes
- github.com/symfony/ux/releases/tag/v3.1.0nvdRelease Notes
News mentions
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