MEDIUM

CVE-2025-55183

CVSS v3

5.3

MEDIUM

EPSS Score

64.2 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

react-server-dom-parcelnpmfrom 19.2.0 · fixed in 19.2.2and 2 other packages

Vendor advisories

CVE-2025-55183 Red Hat Product Security
next: React Server Components: Source code exposure through crafted HTTP request

Full record on NVD

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.

Technical details

Published: 2025-12-11

Frequently asked questions

What is CVE-2025-55183?

Is CVE-2025-55183 actively exploited?

Active exploitation of CVE-2025-55183 has not been confirmed. Its EPSS score was 64.2% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-55183?

CVE-2025-55183 has a CVSS v3 base score of 5.3 (MEDIUM severity).

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