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CVE

GHSA-h25m-26qc-wcjf

Next.js HTTP request deserialization can lead to DoS when using insecure React Server Components
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CVE

GHSA-h25m-26qc-wcjf

Next.js HTTP request deserialization can lead to DoS when using insecure React Server Components

A vulnerability affects certain React Server Components packages for versions 19.0.x, 19.1.x, and 19.2.x and frameworks that use the affected packages, including Next.js 13.x, 14.x, 15.x, and 16.x using the App Router. The issue is tracked upstream as CVE-2026-23864.

A specially crafted HTTP request can be sent to any App Router Server Function endpoint that, when deserialized, may trigger excessive CPU usage, out-of-memory exceptions, or server crashes. This can result in denial of service in unpatched environments.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
-
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Related Resources

No items found.

References

https://github.com/facebook/react/security/advisories/GHSA-83fc-fqcc-2hmg, https://github.com/vercel/next.js/security/advisories/GHSA-h25m-26qc-wcjf, https://nvd.nist.gov/vuln/detail/CVE-2026-23864, https://github.com/vercel/next.js, https://vercel.com/changelog/summary-of-cve-2026-23864

Severity

7.5

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.5
EPSS Probability
0%
EPSS Percentile
0%
Introduced Version
13.0.0,16.2.0-canary.0,16.1.0-canary.0,16.0.0-beta.0,15.6.0-canary.0,15.5.0,15.4.0-canary.0,15.3.0-canary.0,15.2.0-canary.0,15.1.0,13.2.5-canary.13
Fix Available
15.0.8,16.2.0-canary.9,16.1.5,16.0.11,15.6.0-canary.61,15.5.10,15.4.11,15.3.9,15.2.9,15.1.12

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