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CVE

GHSA-fv66-9v8q-g76r

React Server Components are Vulnerable to RCE
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CVE

GHSA-fv66-9v8q-g76r

React Server Components are Vulnerable to RCE

Impact

There is an unauthenticated remote code execution vulnerability in React Server Components.

We recommend upgrading immediately.

The vulnerability is present in versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 of:

Patches

A fix was introduced in versions 19.0.1, 19.1.2, and 19.2.1. If you are using any of the above packages please upgrade to any of the fixed versions immediately.

If your app’s React code does not use a server, your app is not affected by this vulnerability. If your app does not use a framework, bundler, or bundler plugin that supports React Server Components, your app is not affected by this vulnerability.

References

See the blog post for more information and upgrade instructions.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
10
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
C
H
U
10
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Related Resources

No items found.

References

https://github.com/facebook/react/security/advisories/GHSA-fv66-9v8q-g76r, https://nvd.nist.gov/vuln/detail/CVE-2025-55182, https://github.com/facebook/react/pull/35277, https://github.com/facebook/react/commit/7dc903cd29dac55efb4424853fd0442fef3a8700, https://github.com/ejpir/CVE-2025-55182-poc, https://github.com/facebook/react, https://github.com/facebook/react/releases/tag/v19.0.1, https://github.com/facebook/react/releases/tag/v19.1.2, https://github.com/facebook/react/releases/tag/v19.2.1, https://news.ycombinator.com/item?id=46136026, https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components, https://www.facebook.com/security/advisories/cve-2025-55182, http://www.openwall.com/lists/oss-security/2025/12/03/4

Severity

10

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
10
EPSS Probability
0.62327%
EPSS Percentile
0.98289%
Introduced Version
19.0.0,19.3.0-canary-a757cb76-20251002,19.2.0-canary-63779030-20250328,19.1.0-canary-130095f7-20241212,18.3.0-canary-388686f29-20230503,0.0.0-experimental-3310209d0,19.1.0-canary-7130d0c6-20241212,0.0.0,0.0.0-experimental-7130d0c6-20241212,18.3.0-canary-62512bafc-20230928,0.0.0-experimental-13d0225c7-20230928,16.0.0-beta.0,16.0.0-canary.0,15.6.0-canary.0,15.5.0,15.4.0-canary.0,15.3.0-canary.0,15.2.0-canary.0,15.1.0,14.3.0-canary.77
Fix Available
19.0.1,19.3.0-canary-7dc903cd-20251203,19.2.1,19.1.2,0.0.0-experimental-7dc903cd-20251203,16.1.0-canary.12,16.0.7,15.6.0-canary.58,15.5.7,15.4.8,15.3.6,15.2.6,15.1.9,15.0.5

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