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Vulnerability Details CVE-2026-49212

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 7.7%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-49212
  • Symfony » Ux » Version: 2.10.0
    cpe:2.3:a:symfony:ux:2.10.0
  • Symfony » Ux » Version: 2.11.0
    cpe:2.3:a:symfony:ux:2.11.0
  • Symfony » Ux » Version: 2.11.1
    cpe:2.3:a:symfony:ux:2.11.1
  • Symfony » Ux » Version: 2.11.2
    cpe:2.3:a:symfony:ux:2.11.2
  • Symfony » Ux » Version: 2.12.0
    cpe:2.3:a:symfony:ux:2.12.0
  • Symfony » Ux » Version: 2.13.0
    cpe:2.3:a:symfony:ux:2.13.0
  • Symfony » Ux » Version: 2.13.1
    cpe:2.3:a:symfony:ux:2.13.1
  • Symfony » Ux » Version: 2.13.2
    cpe:2.3:a:symfony:ux:2.13.2
  • Symfony » Ux » Version: 2.13.3
    cpe:2.3:a:symfony:ux:2.13.3
  • Symfony » Ux » Version: 2.14.0
    cpe:2.3:a:symfony:ux:2.14.0
  • Symfony » Ux » Version: 2.14.1
    cpe:2.3:a:symfony:ux:2.14.1
  • Symfony » Ux » Version: 2.14.2
    cpe:2.3:a:symfony:ux:2.14.2
  • Symfony » Ux » Version: 2.15.0
    cpe:2.3:a:symfony:ux:2.15.0
  • Symfony » Ux » Version: 2.16.0
    cpe:2.3:a:symfony:ux:2.16.0
  • Symfony » Ux » Version: 2.17.0
    cpe:2.3:a:symfony:ux:2.17.0
  • Symfony » Ux » Version: 2.18.0
    cpe:2.3:a:symfony:ux:2.18.0
  • Symfony » Ux » Version: 2.18.1
    cpe:2.3:a:symfony:ux:2.18.1
  • Symfony » Ux » Version: 2.19.0
    cpe:2.3:a:symfony:ux:2.19.0
  • Symfony » Ux » Version: 2.19.1
    cpe:2.3:a:symfony:ux:2.19.1
  • Symfony » Ux » Version: 2.19.2
    cpe:2.3:a:symfony:ux:2.19.2
  • Symfony » Ux » Version: 2.19.3
    cpe:2.3:a:symfony:ux:2.19.3
  • Symfony » Ux » Version: 2.20.0
    cpe:2.3:a:symfony:ux:2.20.0
  • Symfony » Ux » Version: 2.21.0
    cpe:2.3:a:symfony:ux:2.21.0
  • Symfony » Ux » Version: 2.22.0
    cpe:2.3:a:symfony:ux:2.22.0
  • Symfony » Ux » Version: 2.22.1
    cpe:2.3:a:symfony:ux:2.22.1
  • Symfony » Ux » Version: 2.23.0
    cpe:2.3:a:symfony:ux:2.23.0
  • Symfony » Ux » Version: 2.24.0
    cpe:2.3:a:symfony:ux:2.24.0
  • Symfony » Ux » Version: 2.25.0
    cpe:2.3:a:symfony:ux:2.25.0
  • Symfony » Ux » Version: 2.25.1
    cpe:2.3:a:symfony:ux:2.25.1
  • Symfony » Ux » Version: 2.25.2
    cpe:2.3:a:symfony:ux:2.25.2
  • Symfony » Ux » Version: 2.26.0
    cpe:2.3:a:symfony:ux:2.26.0
  • Symfony » Ux » Version: 2.26.1
    cpe:2.3:a:symfony:ux:2.26.1
  • Symfony » Ux » Version: 2.27.0
    cpe:2.3:a:symfony:ux:2.27.0
  • Symfony » Ux » Version: 2.28.0
    cpe:2.3:a:symfony:ux:2.28.0
  • Symfony » Ux » Version: 2.28.1
    cpe:2.3:a:symfony:ux:2.28.1
  • Symfony » Ux » Version: 2.28.2
    cpe:2.3:a:symfony:ux:2.28.2
  • Symfony » Ux » Version: 2.29.0
    cpe:2.3:a:symfony:ux:2.29.0
  • Symfony » Ux » Version: 2.29.1
    cpe:2.3:a:symfony:ux:2.29.1
  • Symfony » Ux » Version: 2.29.2
    cpe:2.3:a:symfony:ux:2.29.2
  • Symfony » Ux » Version: 2.30.0
    cpe:2.3:a:symfony:ux:2.30.0
  • Symfony » Ux » Version: 2.31.0
    cpe:2.3:a:symfony:ux:2.31.0
  • Symfony » Ux » Version: 2.32.0
    cpe:2.3:a:symfony:ux:2.32.0
  • Symfony » Ux » Version: 2.33.0
    cpe:2.3:a:symfony:ux:2.33.0
  • Symfony » Ux » Version: 2.34.0
    cpe:2.3:a:symfony:ux:2.34.0
  • Symfony » Ux » Version: 2.35.0
    cpe:2.3:a:symfony:ux:2.35.0
  • Symfony » Ux » Version: 2.8.0
    cpe:2.3:a:symfony:ux:2.8.0
  • Symfony » Ux » Version: 2.8.1
    cpe:2.3:a:symfony:ux:2.8.1
  • Symfony » Ux » Version: 2.9.0
    cpe:2.3:a:symfony:ux:2.9.0
  • Symfony » Ux » Version: 2.9.1
    cpe:2.3:a:symfony:ux:2.9.1
  • Symfony » Ux » Version: 2.9.2
    cpe:2.3:a:symfony:ux:2.9.2
  • Symfony » Ux » Version: 3.0.0
    cpe:2.3:a:symfony:ux:3.0.0


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