Vulnerability Report

CVE-2026-44576

Title: React Server Components Cache Poisoning

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-44576.

CWE Category CWE-436

Published Date May 13, 2026

Modified Date May 14, 2026

Exploit Status Not Found

Score 5.4 CVSS v3.1

Exploit Probability (EPSS)

0.02%

Vulnerability Summary

CVE-2026-44576: Next.js is a React framework for building full-stack web applications. From 14.2.0 to before 15.5.16 and 16.2.5, applications using React Server Components can be vulnerable to cache poisoning when shared caches do not correctly partition response variants. Under affected conditions, an attacker can cause an RSC response to be served from the original URL and poison shared cache entries so later visitors receive component payloads instead of the expected HTML. This vulnerability is fixed in 15.5.16 and 16.2.5.

Impacted Vendors

vercel 1

kanopi 1

Reference Links

https://github.com/vercel/next.js/security/advisories/GHSA-wfc6-r584-vfw7

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

5.4

Attack Vector

NETWORK

Complexity

HIGH

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

CHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-44576 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

May 14, 2026 MODIFIED

Vulnerability data updated via NVD.

May 13, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity HIGH

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L

Affected Stack

No specific products linked.