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CVE-2026-126187

9.5 criticalFix available

Critical (9.5) in react react. Fixed in react-server-dom-parcel 19.0.9, 19.1.10, 19.2.9.

On this page
React is a JavaScript library for building user interfaces. From 19.0.0 until 19.0.9, 19.1.10, 19.2.9, and 19.3.1, the react-server-dom-webpack, react-server-dom-parcel, and react-server-dom-turbopack packages are vulnerable to unauthenticated remote code execution through crafted payloads targeting frameworks that support React Server Components. The vulnerability only affects extremely rare cases where responses transport multiple typed arrays and an attacker-controlled value. Applications whose React code does not use a server are not affected. Applications that do not use a framework, bundler, or bundler plugin that supports React Server Components are not affected. This issue is fixed in versions 19.0.9, 19.1.10, 19.2.9, and 19.3.1.

Severity

CVSS 4.0

9.5 critical
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:N
CWE
CWE-502 Deserialization of Untrusted Data
OWASP Top 10
A08:2025 Software or Data Integrity Failures
Published
Assigned by
GitHub_M (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

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Affected

Versions

From the CNA's record in the CVE List.

ProductAffected
react>= 19.0.0, < 19.0.9
react>= 19.1.0, < 19.1.10
react>= 19.2.0, < 19.2.9
react>= 19.3.0, < 19.3.1

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-xqc2-xf4c-x3h3npmreact-server-dom-parcel>=19.0.0 <19.0.919.0.9
GHSA-xqc2-xf4c-x3h3npmreact-server-dom-parcel>=19.1.0 <19.1.1019.1.10
GHSA-xqc2-xf4c-x3h3npmreact-server-dom-parcel>=19.2.0 <19.2.919.2.9
GHSA-xqc2-xf4c-x3h3npmreact-server-dom-parcel>=19.3.0 <19.3.119.3.1
GHSA-xqc2-xf4c-x3h3npmreact-server-dom-turbopack>=19.0.0 <19.0.919.0.9
GHSA-xqc2-xf4c-x3h3npmreact-server-dom-turbopack>=19.1.0 <19.1.1019.1.10
GHSA-xqc2-xf4c-x3h3npmreact-server-dom-turbopack>=19.2.0 <19.2.919.2.9
GHSA-xqc2-xf4c-x3h3npmreact-server-dom-turbopack>=19.3.0 <19.3.119.3.1
GHSA-xqc2-xf4c-x3h3npmreact-server-dom-webpack>=19.0.0 <19.0.919.0.9
GHSA-xqc2-xf4c-x3h3npmreact-server-dom-webpack>=19.1.0 <19.1.1019.1.10
GHSA-xqc2-xf4c-x3h3npmreact-server-dom-webpack>=19.2.0 <19.2.919.2.9
GHSA-xqc2-xf4c-x3h3npmreact-server-dom-webpack>=19.3.0 <19.3.119.3.1

Attack patterns (CAPEC)

  • CAPEC-586 Object Injection Likelihood: Medium · Severity: High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

References

Check your stackJSON