TI-2026-32494 Aliases CVE-2026-44582 GHSA-vfv6-92ff-j949

Next.js: Cache poisoning via collisions in React Server Component cache-busting

LOW 17CWE-328Published 2026-05-13 · Updated 2026-05-14

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: —
Confidentiality · integrity · availability: None · Low · None
Fix status: Partial Red Hat: 8 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00215 11th percentileScored 2026-11-07

Fix Partial next.js (vercel): 15.5.16, 16.2.5next (npm): 15.5.16, 16.2.5Red Hat: 8 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
vercel	next.js	13.4.6 to before 15.5.16; 16.0.0 to before 16.2.5	15.5.16, 16.2.5	Patch available	CNA
—	next (npm)	13.4.6 to before 15.5.16	15.5.16	Patch available	GHSA-vfv6-92ff-j949
—	next (npm)	16.0.0 to before 16.2.5	16.2.5	Patch available	GHSA-vfv6-92ff-j949

next.js Vendorvercel Affected 13.4.6 to before 15.5.16; 16.0.0 to before 16.2.5 Fixed in 15.5.16, 16.2.5 Patch available CNA
next (npm) Vendor— Affected 13.4.6 to before 15.5.16 Fixed in 15.5.16 Patch available GHSA-vfv6-92ff-j949
next (npm) Vendor— Affected 16.0.0 to before 16.2.5 Fixed in 16.2.5 Patch available GHSA-vfv6-92ff-j949

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:vercel:next.js::::::node.js::*	13.4.6 to before 15.5.16; 16.0.0 to before 16.2.5	Vulnerable	vercel

cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:* Versions 13.4.6 to before 15.5.16; 16.0.0 to before 16.2.5 Vulnerable ·vercel

Remediation

Fix · CNA next.js (vercel) Fixed in 15.5.16, 16.2.5
Fix · GHSA-vfv6-92ff-j949 next (npm) Fixed in 15.5.16 Advisory →
Fix · GHSA-vfv6-92ff-j949 next (npm) Fixed in 16.2.5 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 7	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux AI (RHEL AI) 3	Affected	No fix yet: Fix deferred
Red Hat Trusted Artifact Signer	Affected	No fix yet: Fix deferred
streams for Apache Kafka 2	Affected	No fix yet: Fix deferred
streams for Apache Kafka 3	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-44582
2026-10-03 Alias added: GHSA-vfv6-92ff-j949

References

Advisory 2

Other 3

TI-2025-34861 Deserialization of untrusted data in Meta react-server-dom-webpack KEVCVSS 3.1CRITICAL 10.0
TI-2025-21309 Authorization Bypass in Next.js Middleware CVSS 3.1CRITICAL 9.1
TI-2025-34863 Deserialization of untrusted data in Meta react-server-dom-webpack CVSS 3.1HIGH 7.5
TI-2024-31371 Cache Poisoning in next.js CVSS 3.1HIGH 7.5
TI-2023-24914 Next.js before 13.4.20-canary.13 lacks a cache-control header and thus empty prefetch… CVSS 3.1HIGH 7.5
TI-2026-32490 Next.js: Server-side request forgery in applications using WebSocket upgrades CVSS 3.1HIGH 8.6

See all 62 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences