# CVE-2026-44576: Next.js: Cache poisoning in React Server Component responses

> CVE-2026-44576: Next.js: Cache poisoning in React Server Component responses. CVSS 5.4 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-44576
Last updated: 2026-06-17T10:50:49Z

- Published: 2026-05-13 16:57 UTC · Updated: 2026-06-17 10:50 UTC · Assigner: GitHub\_M
- CVSS: 5.4 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L
- EPSS: 0.30%, 22th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-436

## Description

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.

## Affected vendors and products

- vercel: next.js

## Tracked companies

- [Vercel](https://rewindex.com/company/vercel.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-44576)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-44576)
- [https://github.com/vercel/next.js/security/advisories/GHSA-wfc6-r584-vfw7](https://github.com/vercel/next.js/security/advisories/GHSA-wfc6-r584-vfw7)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-44576 · Markdown: https://rewindex.com/cve/CVE-2026-44576.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-44576 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:47:39.589Z