Next.js Affected by Cache Key Confusion for Image Optimization API Routes
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Partial Red Hat: 7 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. In versions before 14.2.31 and from 15.0.0 to before 15.4.5, Next.js Image Optimization API routes are affected by cache key confusion. When images returned from API routes vary based on request headers (such as Cookie or Authorization), these responses could be incorrectly cached and served to unauthorized users due to a cache key confusion bug. This vulnerability has been fixed in Next.js versions 14.2.31 and 15.4.5. All users are encouraged to upgrade if they use API routes to serve images that depend on request headers and have image optimization enabled.
Why it matters now
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 | 15.0.0 to before 15.4.5; before 14.2.31 | 15.4.5, 14.2.31 | Patch available | CNA |
| — | next (npm) | 0.9.9 to before 14.2.31 | 14.2.31 | Patch available | GHSA-g5qg-72qw-gw5v |
| — | next (npm) | 15.0.0 to before 15.4.5 | 15.4.5 | Patch available | GHSA-g5qg-72qw-gw5v |
- next.js Vendorvercel Affected 15.0.0 to before 15.4.5; before 14.2.31 Fixed in 15.4.5, 14.2.31 Patch available CNA
- next (npm) Vendor— Affected 0.9.9 to before 14.2.31 Fixed in 14.2.31 Patch available GHSA-g5qg-72qw-gw5v
- next (npm) Vendor— Affected 15.0.0 to before 15.4.5 Fixed in 15.4.5 Patch available GHSA-g5qg-72qw-gw5v
Remediation
- Fix · CNA next.js (vercel) Fixed in 15.4.5, 14.2.31
- Fix · GHSA-g5qg-72qw-gw5v next (npm) Fixed in 14.2.31 Advisory →
- Fix · GHSA-g5qg-72qw-gw5v next (npm) Fixed in 15.4.5 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. 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 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-2025-57752
- 2026-10-03 Alias added: GHSA-g5qg-72qw-gw5v
References
Patch 2
Advisory 3
More vercel Next.js vulnerabilities
- 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
Sources
- CVE-2025-57752 · CVE Program
- CVE-2025-57752 · NVD
- FIRST EPSS
- GHSA-g5qg-72qw-gw5v · GitHub Advisory Database · CC BY 4.0
- CVE-2025-57752 · Red Hat security data · CC BY 4.0
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