What is CVE-2025-55182?

CVE-2025-55182 is a critical-severity vulnerability in Meta React-server-dom-parcel. CVSS score: 10.0/10. Published 2025-12-03.

How severe is CVE-2025-55182?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Is CVE-2025-55182 known to be exploited?

Yes. CVE-2025-55182 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-12-05), indicating it is being actively exploited. 468 public proof-of-concept repositories are indexed.

Vulnerability in Meta React-server-dom-parcel

CVE-2025-55182

A pre-authentication remote code execution vulnerability exists in React Server Components versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-…

EPSS: 0.845 (99.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Meta React-server-dom-parcel — versions 19.0.0, 19.1.0, 19.2.0
Meta React-server-dom-turbopack — versions 19.0.0, 19.1.0, 19.2.0
Meta React-server-dom-webpack — versions 19.0.0, 19.1.0, 19.2.0

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2025-12-05. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2025-12-12.

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

www.facebook.com/security/advisories/cve-2025-55182 (x_refsource_CONFIRM)
react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-compo… (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2025-55182?: CVE-2025-55182 is a critical-severity vulnerability in Meta React-server-dom-parcel. CVSS score: 10.0/10. Published 2025-12-03.
How severe is CVE-2025-55182?: Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2025-55182 known to be exploited?: Yes. CVE-2025-55182 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-12-05), indicating it is being actively exploited. 468 public proof-of-concept repositories are indexed.