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,…

Description

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.

Scores

EPSS (exploitation in 30 days)

64.2% · top 0.8% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: yes · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.

Weakness

• (CWE-502) Deserialization of Untrusted Data. (CWE-497) Exposure of Sensitive System Information to an Unauthorized Actor

Affected products

• Meta · react-server-dom-webpack

  • affected 19.0.0 – ≤ 19.0.1
  • affected 19.1.0 – ≤ 19.1.2
  • affected 19.2.0 – ≤ 19.2.1

• Meta · react-server-dom-turbopack

  • affected 19.0.0 – ≤ 19.0.1
  • affected 19.1.0 – ≤ 19.1.2
  • affected 19.2.0 – ≤ 19.2.1

• Meta · react-server-dom-parcel

  • affected 19.0.0 – ≤ 19.0.1
  • affected 19.1.0 – ≤ 19.1.2
  • affected 19.2.0 – ≤ 19.2.1

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• npmreact-server-dom-parcelGHSA-925w-6v3x-g4j4 (opens in a new tab)
• npmreact-server-dom-turbopackGHSA-925w-6v3x-g4j4 (opens in a new tab)
• npmreact-server-dom-webpackGHSA-925w-6v3x-g4j4 (opens in a new tab)

References (2)

• https://www.facebook.com/security/advisories/cve-2025-55183 (opens in a new tab)x_refsource_CONFIRM
• https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-components (opens in a new tab)x_refsource_CONFIRM

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-925w-6v3x-g4j4 (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2025-55183](https://trackcve.app/badge/CVE-2025-55183.svg)](https://trackcve.app/cve/CVE-2025-55183)

Record last updated 7 Jan 2026, 16:26 UTC.