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CVE-2025-55184

HIGH
7.5
CVSS Score
Published: December 11, 2025 at 08:05 PM UTC
Updated: October 7, 2026 at 08:10 PM UTC
5 products affected across 2 vendorsNext.jsReactReact Server Dom Webpack

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Severity
HIGH7.5
Exploit prediction
EPSS 67%
SSVC
PoC

Description

A pre-authentication denial of service vulnerability exists in React Server Components versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.0 and 19.2.1, 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, which can cause an infinite loop that hangs the server process and may prevent future HTTP requests from being served.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

React· Facebook
95%
19.0.0 ≤ v < 19.0.219.1.0 ≤ v < 19.1.319.2.0 ≤ v < 19.2.2
Affected range stops below 19.0.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 19.1.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 19.2.2, so it looks safe — our inference, not a vendor statement
Next.js· Vercelnpm
95%
13.3.0 ≤ v < 14.2.3515.0.0 ≤ v < 15.0.715.1.0 ≤ v < 15.1.1115.2.0 ≤ v < 15.2.815.3.0 ≤ v < 15.3.815.4.0 ≤ v < 15.4.1015.5.0 ≤ v < 15.5.916.0.0 ≤ v < 16.0.1015.6.015.6.0 canary015.6.0 canary115.6.0 canary1015.6.0 canary1115.6.0 canary1215.6.0 canary1315.6.0 canary1415.6.0 canary1515.6.0 canary1615.6.0 canary1715.6.0 canary1815.6.0 canary1915.6.0 canary215.6.0 canary2015.6.0 canary2115.6.0 canary2215.6.0 canary2315.6.0 canary2415.6.0 canary2515.6.0 canary2615.6.0 canary2715.6.0 canary2815.6.0 canary2915.6.0 canary315.6.0 canary3015.6.0 canary3115.6.0 canary3215.6.0 canary3315.6.0 canary3415.6.0 canary3515.6.0 canary3615.6.0 canary3715.6.0 canary3815.6.0 canary3915.6.0 canary415.6.0 canary4015.6.0 canary4115.6.0 canary4215.6.0 canary4315.6.0 canary4415.6.0 canary4515.6.0 canary4615.6.0 canary4715.6.0 canary4815.6.0 canary4915.6.0 canary515.6.0 canary5015.6.0 canary5115.6.0 canary5215.6.0 canary5315.6.0 canary5415.6.0 canary5515.6.0 canary5615.6.0 canary5715.6.0 canary5815.6.0 canary5915.6.0 canary615.6.0 canary715.6.0 canary815.6.0 canary916.1.016.1.0 canary016.1.0 canary116.1.0 canary1016.1.0 canary1116.1.0 canary1216.1.0 canary1316.1.0 canary1416.1.0 canary1516.1.0 canary1616.1.0 canary1716.1.0 canary1816.1.0 canary216.1.0 canary316.1.0 canary416.1.0 canary516.1.0 canary616.1.0 canary716.1.0 canary816.1.0 canary9
Affected range stops below 14.2.35, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.0.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.1.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.2.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.3.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.4.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.5.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.0.10, so it looks safe — our inference, not a vendor statement
React Server Dom Parcel· Facebooknpm
60%
19.0.0 ≤ v ≤ 19.0.119.1.0 ≤ v ≤ 19.1.219.2.0 ≤ v ≤ 19.2.119.0.019.1.019.2.0
React Server Dom Turbopack· Facebooknpm
60%
19.0.0 ≤ v ≤ 19.0.119.1.0 ≤ v ≤ 19.1.219.2.0 ≤ v ≤ 19.2.119.0.019.1.019.2.0
React Server Dom Webpack· Facebooknpm
60%
19.0.0 ≤ v ≤ 19.0.119.1.0 ≤ v ≤ 19.1.219.2.0 ≤ v ≤ 19.2.119.0.019.1.019.2.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_CONFIRMVendor Advisory
Source: cverecord
https://www.facebook.com/security/advisories/cve-2025-55184
x_refsource_CONFIRMVendor Advisory
Source: cverecord
https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-components
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://github.com/KingHacker353/CVE-2025-55184

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHMeta
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-502

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