What is CVE-2025-55184?
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.
The record classifies CVE-2025-55184 under weakness class CWE-502. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on availability. 83 affected-product entries are recorded, across 2 vendors, listed below. The identifier was first published 322 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 7.5 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS (FIRST)
- 66.8% probability of exploitation in the next 30 days, higher than 99.2% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 10/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2025-12-11, last modified 2025-12-15
Is CVE-2025-55184 being exploited?
Weaponised exploit code for CVE-2025-55184 is publicly available. 9 public proof-of-concept repositories are tracked for this identifier. A ProjectDiscovery Nuclei detection template exists (http/cves/2025/CVE-2025-55184.yaml). It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.
- cybertechajju/CVE-2025-55184-POC-Expolit (github)
- ejpir/CVE-2025-55184 (github)
- hans362/CVE-2025-55184-poc (github)
- KkHackingLearning/CVE-2025-55184_Testing (github)
- KingHacker353/CVE-2025-55184 (github)
- shubham-01-star/OpsGuard-simulation (github)
- bakhod1r/CVE-2025-55184 (github)
- Tarekhshaikh13/CVE-2025-55184 (github)
Affected products and versions
Showing 4 of 83 recorded product entries.
Affected software packages:
npm:react-server-dom-parcel— patched in 19.0.2npm:react-server-dom-turbopack— patched in 19.0.2npm:react-server-dom-webpack— patched in 19.0.2npm:react-server-dom-parcel— patched in 19.1.3npm:react-server-dom-parcel— patched in 19.2.2npm:react-server-dom-turbopack— patched in 19.1.3npm:react-server-dom-turbopack— patched in 19.2.2npm:react-server-dom-webpack— patched in 19.1.3npm:react-server-dom-webpack— patched in 19.2.2
How to fix CVE-2025-55184
Fixed versions are recorded for 9 packages: npm:react-server-dom-parcel 19.0.2, npm:react-server-dom-turbopack 19.0.2, npm:react-server-dom-webpack 19.0.2, npm:react-server-dom-parcel 19.1.3, npm:react-server-dom-parcel 19.2.2, npm:react-server-dom-turbopack 19.1.3, npm:react-server-dom-turbopack 19.2.2, npm:react-server-dom-webpack 19.1.3, npm:react-server-dom-webpack 19.2.2. Vendor advisory: https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-components. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2025-55184
1 tracked threat in the Threadlinqs corpus references CVE-2025-55184, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories, ProjectDiscovery Nuclei. Last verified by Threadlinqs on .