CVE-2025-55183An information leak vulnerability exists in specific configurations of 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: rea…
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An information leak vulnerability exists in specific configurations of 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. A specifically crafted HTTP request sent to a vulnerable Server Function may unsafely return the source code of any Server Function. Exploitation requires the existence of a Server Function which explicitly or implicitly exposes a stringified argument.
- CVSS
- 5.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Oct 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
vercel next.js vercel:next.js | from 15.0.0 before 15.0.7; from 15.1.0 before 15.1.11; from 15.2.0 before 15.2.8; from 15.3.0 before 15.3.8; from 15.4.0 before 15.4.10; from 15.5.0 before 15.5.9; from 16.0.0 before 16.0.10; 15.6.0; and 80 more ranges | NVD |
facebook react facebook:react | from 19.0.0 before 19.0.2; from 19.1.0 before 19.1.3; from 19.2.0 before 19.2.2 | NVD |
References
- https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-componentsexploit, vendor-advisory
- https://www.facebook.com/security/advisories/cve-2025-55183vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.