CVE-2025-55183

MEDIUM

5.3

CVSS Score

Published: December 11, 2025 at 08:04 PM UTC

Updated: October 7, 2026 at 08:10 PM UTC

5 products affected across 2 vendorsNext.jsReactReact Server Dom Webpack

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Severity

MEDIUM5.3

Exploit prediction

EPSS 64%

SSVC

PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

React · Facebook

95%

19.0.0 ≤ v < 19.0.219.1.0 ≤ v < 19.1.319.2.0 ≤ v < 19.2.2

Affected range stops below 19.0.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 19.1.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 19.2.2, so it looks safe — our inference, not a vendor statement

Next.js · Vercelnpm

95%

15.0.0 ≤ v < 15.0.715.1.0 ≤ v < 15.1.1115.2.0 ≤ v < 15.2.815.3.0 ≤ v < 15.3.815.4.0 ≤ v < 15.4.1015.5.0 ≤ v < 15.5.916.0.0 ≤ v < 16.0.1015.6.0 15.6.0 canary0 15.6.0 canary1 15.6.0 canary10 15.6.0 canary11 15.6.0 canary12 15.6.0 canary13 15.6.0 canary14 15.6.0 canary15 15.6.0 canary16 15.6.0 canary17 15.6.0 canary18 15.6.0 canary19 15.6.0 canary2 15.6.0 canary20 15.6.0 canary21 15.6.0 canary22 15.6.0 canary23 15.6.0 canary24 15.6.0 canary25 15.6.0 canary26 15.6.0 canary27 15.6.0 canary28 15.6.0 canary29 15.6.0 canary3 15.6.0 canary30 15.6.0 canary31 15.6.0 canary32 15.6.0 canary33 15.6.0 canary34 15.6.0 canary35 15.6.0 canary36 15.6.0 canary37 15.6.0 canary38 15.6.0 canary39 15.6.0 canary4 15.6.0 canary40 15.6.0 canary41 15.6.0 canary42 15.6.0 canary43 15.6.0 canary44 15.6.0 canary45 15.6.0 canary46 15.6.0 canary47 15.6.0 canary48 15.6.0 canary49 15.6.0 canary5 15.6.0 canary50 15.6.0 canary51 15.6.0 canary52 15.6.0 canary53 15.6.0 canary54 15.6.0 canary55 15.6.0 canary56 15.6.0 canary57 15.6.0 canary58 15.6.0 canary59 15.6.0 canary6 15.6.0 canary7 15.6.0 canary8 15.6.0 canary9 16.1.0 16.1.0 canary0 16.1.0 canary1 16.1.0 canary10 16.1.0 canary11 16.1.0 canary12 16.1.0 canary13 16.1.0 canary14 16.1.0 canary15 16.1.0 canary16 16.1.0 canary17 16.1.0 canary18 16.1.0 canary2 16.1.0 canary3 16.1.0 canary4 16.1.0 canary5 16.1.0 canary6 16.1.0 canary7 16.1.0 canary8 16.1.0 canary9

Affected range stops below 15.0.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1.11, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.2.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.3.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.4.10, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.5.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.0.10, so it looks safe — our inference, not a vendor statement

React Server Dom Parcel · Facebooknpm

60%

19.0.0 ≤ v ≤ 19.0.119.1.0 ≤ v ≤ 19.1.219.2.0 ≤ v ≤ 19.2.119.0.0 19.1.0 19.2.0

React Server Dom Turbopack · Facebooknpm

60%

19.0.0 ≤ v ≤ 19.0.119.1.0 ≤ v ≤ 19.1.219.2.0 ≤ v ≤ 19.2.119.0.0 19.1.0 19.2.0

React Server Dom Webpack · Facebooknpm

60%

19.0.0 ≤ v ≤ 19.0.119.1.0 ≤ v ≤ 19.1.219.2.0 ≤ v ≤ 19.2.119.0.0 19.1.0 19.2.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_CONFIRMVendor Advisory

Source: cverecord

https://www.facebook.com/security/advisories/cve-2025-55183

x_refsource_CONFIRMExploitVendor Advisory

Source: cverecord

https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-components

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMMeta

Vector?

Quick Info

StatusANALYZED

CWE

NVD-CWE-noinfo

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