CVE-2025-55182

criticalpriority · act · 90OT risk · criticalKEV · exploitedEU KEV · CNWEPSS 0.998 · 100 %ileexploit · weaponizedDEEUNLRUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 464 exploits · weaponized

Likely / severe?

99.8% (100th) EPSS

CVSS 10 · critical

Is it mine?

80 products

Check your exposure

Who says so?

7 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

added 2025-12-05remediate by 2025-12-12

required action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

EU KEVflagged by CNWreported 2026-04-08patched 2025-12-03APT

Flaw in how React decodes payloads sent to React Server Function endpoints enabled unauthenticated remote code execution. Apps supporting React Server Components may still be vulnerable even if not implementing any React Server Function endpoints.

EPSS · scored 2026-10-26

Meta React Server Components Remote Code Execution Vulnerability

A pre-authentication remote code execution vulnerability exists in React Server Components versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 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.

cvss

Technical severity, 0–10. One row per scoring source.

10.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.110criticalAV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hsecondary · cve-assign@fb.comexploitability 3.9 · impact 6

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hsecondary · OSV

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hsecondary · NCSC-NL NL

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-502USprimaryCWE-502USCWE-502USCWE-502US

exploits (464)

Public proof-of-concept and weaponised exploit code.

exploit/multi/http/react2shell_unauth_rce_cve_2025_55182Unauthenticated RCE in React Server Components (React2Shell)weaponized · metasploit
EDB-52506React Server 19.2.0 - Remote Code ExecutionPoC · exploit_db
0x0asif/CVE-2025-551820x0asif/CVE-2025-55182PoC · poc_in_github
0xBlackash/CVE-2025-55182CVE-2025-55182PoC · poc_in_github
0xN7y/CVE-2025-55182Poc for CVE-2025-55182PoC · poc_in_github
0xPThree/cve-2025-551820xPThree/cve-2025-55182PoC · poc_in_github

affected products (80)

Products and version ranges known to be affected.

Open Source React <19.0.1all versionscert_bundDE
Open Source React <19.1.2all versionscert_bundDE
Open Source React <19.2.1all versionscert_bundDE
Vercel Next.js <15.0.5all versionscert_bundDE
Vercel Next.js <15.1.9all versionscert_bundDE
Vercel Next.js <15.2.6all versionscert_bundDE
Vercel Next.js <15.3.6all versionscert_bundDE
Vercel Next.js <15.4.8all versionscert_bundDE
Vercel Next.js <15.5.7all versionscert_bundDE
Vercel Next.js <16.0.7all versionscert_bundDE
Open Source React< 19.0.1cert_bundDE
Open Source React< 19.1.2cert_bundDE
Open Source React< 19.2.1cert_bundDE
vercel next.js< 15.0.5cert_bundDE
vercel next.js< 15.1.9cert_bundDE
vercel next.js< 15.2.6cert_bundDE
vercel next.js< 15.3.6cert_bundDE
vercel next.js< 15.4.8cert_bundDE
vercel next.js< 15.5.7cert_bundDE
vercel next.js< 16.0.7cert_bundDE

showing 20 of 80

advisories (4)

Vendor and ecosystem advisories describing this.

NCSC-2025-0380Kwetsbaarheden verholpen in React Server ComponentsNL2025-12-03csaf · ncsc_nlNL
React heeft kwetsbaarheden verholpen in bepaalde versies van React Server Components (specifiek voor versies 19.0.0, 19.1.0, 19.1.1 en 19.2.0).
WID-SEC-W-2025-2738Vercel Next.js und React Server Components (React2Shell): Schwachstelle ermöglicht CodeausführungDeutsch2025-12-03csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Vercel Next.js und React ausnutzen, um beliebigen Programmcode auszuführen.
cisco-sa-react-flight-TYw32DdbRemote Code Execution Vulnerability in React and Next.js Frameworks: December 20252025-12-04csaf · cisco_csafUS
On December 3, 2025, the React team released a security advisory regarding a vulnerability, CVE-2025-55182, in the React server that could allow an unauthenticated, remote attacker to perform remote code execution on an affected device or system. For a description of this vulnerability, see the public React Security Advisory ["https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components"]. Cisco's standard practice is to update integrated third-party software components to later versions as they become available.
GHSA-fv66-9v8q-g76rReact Server Components are Vulnerable to RCE2025-12-03ghsa · osvUS
### Impact There is an unauthenticated remote code execution vulnerability in React Server Components. We recommend upgrading immediately. The vulnerability is present in versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 of: * [react-server-dom-webpack](https://www.npmjs.com/package/react-server-dom-webpack) * [react-server-dom-parcel](https://www.npmjs.com/package/react-server-dom-parcel) * [react-server-dom-turbopack](https://www.npmjs.com/package/react-server-dom-turbopack?activeTab=readme) ### Patches A fix was introduced in versions [19.0.1](https://github.com/facebook/react/releases/tag/v19.0.1), [19.1.2](https://github.com/facebook/react/releases/tag/v19.1.2), and [19.2.1](https://github.com/facebook/react/releases/tag/v19.2.1). If you are using any of the above packages please upgrade to any of the fixed versions immediately. If your app’s React code does not use a server, your app is not affected by this vulnerability. If your app does not use a framework, bundler, or bundler plugin that supports React Server Components, your app is not affected by this vulnerability. ### References See the [blog post](https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components) for more information and upgrade instructions.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund ncsc_nl cisco_csaf osv NVD CVE.org MITRE

published 2025-12-03modified 2026-10-18

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+3739 more

references (13)

External citations — patches, advisories, analysis.

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