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GHSA-xqc2-xf4c-x3h3

CriticalCVSS 9.5 / 10
Published Nov 10, 2026·Last modified Nov 10, 2026
Affected Components(12)
npm logoreact-server-dom-parcel
19.0.0 – 19.0.9
npm logoreact-server-dom-turbopack
19.2.0 – 19.2.9
npm logoreact-server-dom-webpack
19.2.0 – 19.2.9
1 / 4
Description

Impact

Crafted payloads targeting frameworks supporting React Server Components can lead to remote code execution. This only affects extremely rare cases where responses transport multiple typed arrays and an attacker-controlled value.

Updating immediately is recommended.

The vulnerability exists in versions 19.0.0 through 19.0.8, 19.1.0 through 19.1.9, 19.2.0 through 19.2.8 and 19.3.0 of:

  • react-server-dom-webpack
  • react-server-dom-parcel
  • react-server-dom-turbopack

Patches

Fixes were back ported to versions 19.0.09, 19.1.10, 19.2.9, and 19.3.1.

If applications are using any of the above packages please upgrade to any of the fixed versions immediately.

If an app’s React code does not use a server, the app is not affected by this vulnerability. If an app does not use a framework, bundler, or bundler plugin that supports React Server Components, the app is not affected by this vulnerability.

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Risk Scores
Base Score
9.5

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence
8.2

Exploitation activity has been observed. Apply available patches or mitigations urgently.

EPSS
1.76%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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