Description
Symfony UX is a JavaScript ecosystem for Symfony. From 2.8.0 until 2.36.0 and 3.1.0, the HMAC computed by Symfony\UX\LiveComponent\LiveComponentHydrator covered only sorted prop key/value pairs and did not include the component name, the slot identifier (props vs propsFromParent), or request context, allowing a signed blob minted for one component or slot to be replayed in another and set a read-only prop on a target component. This issue is fixed in versions 2.36.0 and 3.1.0.
Severity (CVSS)
| Base score | 6.9 |
|---|---|
| Severity | Medium |
| Version | CVSS 4.0 |
| Vector | 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 |
| Provided by | CNA |
Weaknesses
- CWE-345 — CWE-345: Insufficient Verification of Data Authenticity
Affected products
| Vendor | Product | Versions |
|---|---|---|
| symfony | ux | >= 3.0.0, < 3.1.0; < 2.36.0 |
References
- https://github.com/symfony/ux/security/advisories/GHSA-34w5-c283-j9fg (x_refsource_CONFIRM)
- https://github.com/symfony/ux/commit/a224b5af3e2e33ee14ac71356ae0e0877900a81c (x_refsource_MISC)
- https://github.com/symfony/ux/releases/tag/v2.36.0 (x_refsource_MISC)
- https://github.com/symfony/ux/releases/tag/v3.1.0 (x_refsource_MISC)
Generated from the official CVE List on 18 Jul 2026 07:00 UTC.