How severe is CVE-2025-55182?

CVE-2025-55182 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-55182 being actively exploited?

Yes. CVE-2025-55182 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-12-05, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2025-55182?

CVE-2025-55182 primarily affects Facebook React. In total, 76 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-55182?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2025-55182 have an EU (EUVD) identifier?

Yes. CVE-2025-55182 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200983. It is also flagged as exploited in the EUVD (since 2025-12-05).

When was CVE-2025-55182 published?

CVE-2025-55182 was published on 2025-12-03 and last updated on 2026-08-04.

CVE-2025-55182

CVE-2025-55182 is a critical-severity vulnerability in Facebook React with a CVSS 3.x base score of 10.0. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-12-05). The underlying weakness is classified as CWE-502.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
EPSS exploit prediction: 100% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2025-12-05)
EU (EUVD) id: EUVD-2025-200983
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-12-05)
Weakness: CWE-502
Affected product: Facebook React
Published: 2025-12-03
Last modified: 2026-08-04

Description

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-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints.

Frequently asked questions

What is 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-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints.
How severe is CVE-2025-55182?: CVE-2025-55182 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-55182 being actively exploited?: Yes. CVE-2025-55182 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-12-05, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2025-55182?: CVE-2025-55182 primarily affects Facebook React. In total, 76 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-55182?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2025-55182 have an EU (EUVD) identifier?: Yes. CVE-2025-55182 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200983. It is also flagged as exploited in the EUVD (since 2025-12-05).
When was CVE-2025-55182 published?: CVE-2025-55182 was published on 2025-12-03 and last updated on 2026-08-04.

References

Affected products (76)

cpe:2.3:a:facebook:react:19.0.0:*:*:*:*:*:*:*
cpe:2.3:a:facebook:react:19.1.0:*:*:*:*:*:*:*
cpe:2.3:a:facebook:react:19.1.1:*:*:*:*:*:*:*
cpe:2.3:a:facebook:react:19.2.0:*:*:*:*:*:*:*
cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:14.3.0:canary77:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:14.3.0:canary78:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:14.3.0:canary79:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:14.3.0:canary80:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:14.3.0:canary81:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:14.3.0:canary82:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:14.3.0:canary83:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:14.3.0:canary84:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:14.3.0:canary85:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:14.3.0:canary86:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:14.3.0:canary87:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:-:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary0:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary1:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary10:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary11:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary12:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary13:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary14:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary15:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary16:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary17:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary18:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary19:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary2:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary20:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary21:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary22:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary23:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary24:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary25:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary26:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary27:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary28:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary29:*:*:*:node.js:*:*

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