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Fencer Vulns
high 7.5

CVE-2025-55184 in the critical feed json

Denial of Service Vulnerability in React Server Components

published 2025-12-11 10 mo ago modified 2026-10-07 32 d ago also EUVD-2025-202877 , GHSA-2m3v-v2m8-q956 , GHSA-mwv6-3258-q52c

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
66.6%
EPSS 66.6% chance of exploitation in 30 days, percentile 99.2%
public exploits
0
none known, plus a Nuclei check

Summary

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.

Patch / fix

  • npm react-server-dom-parcel 19.0.2, 19.1.3, 19.2.2
  • npm react-server-dom-turbopack 19.0.2, 19.1.3, 19.2.2
  • npm react-server-dom-webpack 19.0.2, 19.1.3, 19.2.2
  • npm next 14.2.34, 15.0.6, 15.1.10, 15.2.7, 15.3.7, 15.4.9, 15.5.8, 15.6.0-canary.59, 16.0.9, 16.1.0-canary.17
  • facebook react 19.0.2, 19.1.3, 19.2.2
  • vercel next.js 14.2.35, 15.0.7, 15.1.11, 15.2.8, 15.3.8, 15.4.10, 15.5.9, 16.0.10

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-55184 updated cvss 7.5

next: React Server Components: Denial of Service via unsafe HTTP deserialization

  • Red Hat Enterprise Linux 7 firefox Red Hat Enterprise Linux 8 firefox, thunderbird Red Hat Enterprise Linux 9 firefox, dotnet7.0, dotnet-host, firefox-x11, thunderbird, dotnet-sdk-7.0, +9 more Red Hat Enterprise Linux 10 firefox, thunderbird Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-cuda-rhel9, rhelai3/disk-image-cuda-rhel9 Red Hat Trusted Artifact Signer rhtas/rekor-search-ui-rhel9
    +2 more products
    Red Hat streams for Apache Kafka 2 com.github.streamshub-console Red Hat streams for Apache Kafka 3 com.github.streamshub-console
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
10 mo ago

Exploit prediction

66.62% chance of exploitation in the next 30 days, higher than 99.2% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template React Server Components - Denial of Service nuclei detection template
  • github.com https://github.com/KingHacker353/CVE-2025-55184 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
npm react-server-dom-parcel
>=19.0.0, <19.0.2
>=19.1.0, <19.1.3
>=19.2.0, <19.2.2
19.0.2
19.1.3
19.2.2
npm react-server-dom-turbopack
>=19.0.0, <19.0.2
>=19.1.0, <19.1.3
>=19.2.0, <19.2.2
19.0.2
19.1.3
19.2.2
npm react-server-dom-webpack
>=19.0.0, <19.0.2
>=19.1.0, <19.1.3
>=19.2.0, <19.2.2
19.0.2
19.1.3
19.2.2
npm next
>=13.3.0, <14.2.34
>=15.0.0-canary.0, <15.0.6
>=15.1.1-canary.0, <15.1.10
>=15.2.0-canary.0, <15.2.7
>=15.3.0-canary.0, <15.3.7
>=15.4.0-canary.0, <15.4.9
>=15.5.1-canary.0, <15.5.8
>=15.6.0-canary.0, <15.6.0-canary.59
>=16.0.0-beta.0, <16.0.9
>=16.1.0-canary.0, <16.1.0-canary.17
14.2.34
15.0.6
15.1.10
15.2.7
15.3.7
15.4.9
15.5.8
15.6.0-canary.59
16.0.9
16.1.0-canary.17

Affected products

  • Meta react-server-dom-webpack
  • Meta react-server-dom-turbopack
  • Meta react-server-dom-parcel

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-502 Deserialization of Untrusted Data
  • CWE-1395 Dependency on Vulnerable Third-Party Component
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of react/react published their own advisory on GitHub. Reviewed sources take precedence over it.