Meta react-server-dom-turbopack up to 19.0.5/19.1.6/19.2.5 HTTP deserialization

Summaryinfo

A vulnerability described as problematic has been identified in Meta react-server-dom-turbopack, react-server-dom-parcel and react-server-dom-webpack up to 19.0.5/19.1.6/19.2.5. This vulnerability affects unknown code of the component HTTP Handler. The manipulation results in deserialization. This vulnerability is identified as CVE-2026-23870. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Meta react-server-dom-turbopack, react-server-dom-parcel and react-server-dom-webpack up to 19.0.5/19.1.6/19.2.5. It has been classified as problematic. Affected is an unknown code block of the component HTTP Handler. The manipulation with an unknown input leads to a deserialization vulnerability. CWE is classifying the issue as CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. This is going to have an impact on availability. CVE summarizes:

A denial of service vulnerability could be triggered by sending specially crafted HTTP requests to server function endpoints, this could lead to server crashes, out-of-memory exceptions or excessive CPU usage; affecting the following packages: react-server-dom-webpack, react-server-dom-parcel, react-server-dom-turbopack (versions 19.0.0 through 19.0.5, 19.1.0 through 19.1.6, and 19.2.0 through 19.2.5).

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-23870 since 01/16/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/14/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1401). Once again VulDB remains the best source for vulnerability data.

Affected

• Vercel Next.js

Productinfo

Type

• JavaScript Library

Vendor

• Meta

Name

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

Version

• 19.0.0
• 19.0.1
• 19.0.2
• 19.0.3
• 19.0.4
• 19.0.5
• 19.1.0
• 19.1.1
• 19.1.2
• 19.1.3
• 19.1.4
• 19.1.5
• 19.1.6
• 19.2.0
• 19.2.1
• 19.2.2
• 19.2.3
• 19.2.4
• 19.2.5

CPE 2.3info

• 🔒
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CPE 2.2info

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• 🔒

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Exploitinginfo

Threat Intelligenceinfo

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Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

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