# CVE-2026-44582: Next.js: Cache poisoning via collisions in React Server Component cache-busting

> CVE-2026-44582: Next.js: Cache poisoning via collisions in React Server Component cache-busting. CVSS 3.7 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-44582
Last updated: 2026-06-17T10:50:51Z

- Published: 2026-05-13 17:08 UTC · Updated: 2026-06-17 10:50 UTC · Assigner: GitHub\_M
- CVSS: 3.7 (CVSS 3.1) · Severity: Low · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
- EPSS: 0.22%, 12th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-328

## Description

Next.js is a React framework for building full-stack web applications. From 13.4.6 to before 15.5.16 and 16.2.5, React Server Component responses can be vulnerable to cache poisoning in deployments that rely on shared caches with insufficient response partitioning. In affected conditions, collisions in the \_rsc cache-busting value can allow an attacker to poison cache entries so users receive the wrong response variant for a given URL. 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-2026-44582)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-44582)
- [https://github.com/vercel/next.js/security/advisories/GHSA-vfv6-92ff-j949](https://github.com/vercel/next.js/security/advisories/GHSA-vfv6-92ff-j949)

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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-2026-44582 · Markdown: https://rewindex.com/cve/CVE-2026-44582.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-44582 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:05:29.728Z