CVE-2026-49208 json
Symfony UX: Format-less date LiveProps parsed with the permissive DateTime constructor
published 2026-06-19 4 mo ago modified 2026-10-24 15 d ago also GHSA-89g7-22c8-3j23 , EUVD-2026-45211
- cvss
- 5.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 35%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist symfony/ux-live-component 2.36.0, 3.1.0
- symfony ux 2.36.0
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/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 |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | symfony/ux-live-component | >=2.8.0, <2.36.0 >=3.0.0, <3.1.0 |
2.36.0 3.1.0 |
Affected products
- symfony ux
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
github.com
/symfony/ux/commit/d24d78fda6df2d5964312255943ebf3a217b79a2
web, patch
-
github.com
/symfony/ux/security/advisories/GHSA-89g7-22c8-3j23
web, vendor-advisory
-
github.com
/symfony/ux/releases/tag/v2.36.0
release-notes
-
github.com
/symfony/ux/releases/tag/v3.1.0
release-notes
-
github.com
/FriendsOfPHP/security-advisories/blob/master/symfony/ux-live-component/CVE-2026-49208.yaml
web
-
github.com
/symfony/ux
package
Sources
- CVE List CVE-2026-49208
- GitHub Advisory GHSA-89g7-22c8-3j23
- NVD CVE-2026-49208
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