Next.js: Unbounded next/image disk cache growth can exhaust storage
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Partial Red Hat: 2 fixed, 1 without a fix
Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-400.
Summary
Next.js is a React framework for building full-stack web applications. Starting in version 10.0.0 and prior to version 16.1.7, the default Next.js image optimization disk cache (`/_next/image`) did not have a configurable upper bound, allowing unbounded cache growth. An attacker could generate many unique image-optimization variants and exhaust disk space, causing denial of service. This is fixed in version 16.1.7 by adding an LRU-backed disk cache with `images.maximumDiskCacheSize`, including eviction of least-recently-used entries when the limit is exceeded. Setting `maximumDiskCacheSize: 0` disables disk caching. If upgrading is not immediately possible, periodically clean `.next/cache/images` and/or reduce variant cardinality (e.g., tighten values for `images.localPatterns`, `images.remotePatterns`, and `images.qualities`).
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- 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 | 10.0.0 to before 16.1.7 | 16.1.7 | Patch available | CNA |
| — | next (npm) | 16.0.0-beta.0 to before 16.1.7 | 16.1.7 | Patch available | GHSA-3x4c-7xq6-9pq8 |
| — | next (npm) | 10.0.0 to before 15.5.14 | 15.5.14 | Patch available | GHSA-3x4c-7xq6-9pq8 |
- next.js Vendorvercel Affected 10.0.0 to before 16.1.7 Fixed in 16.1.7 Patch available CNA
- next (npm) Vendor— Affected 16.0.0-beta.0 to before 16.1.7 Fixed in 16.1.7 Patch available GHSA-3x4c-7xq6-9pq8
- next (npm) Vendor— Affected 10.0.0 to before 15.5.14 Fixed in 15.5.14 Patch available GHSA-3x4c-7xq6-9pq8
Remediation
- Fix · CNA next.js (vercel) Fixed in 16.1.7
- Fix · GHSA-3x4c-7xq6-9pq8 next (npm) Fixed in 16.1.7 Advisory →
- Fix · GHSA-3x4c-7xq6-9pq8 next (npm) Fixed in 15.5.14 Advisory →
Red Hat 2 advisories
- RHSA-2026:34608 Released 2026-07-02 · Red Hat rating ImportantStreams for Apache Kafka 2.9.4 release and security update
- Streams for Apache Kafka 2.9.4
- RHSA-2026:13571 Released 2026-05-04 · Red Hat rating CriticalStreams for Apache Kafka 3.2.0 release and security update
- Streams for Apache Kafka 3.2.0
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux AI (RHEL AI) 3 | Affected | No fix yet |
| Streams for Apache Kafka 2.9.4 | Fixed | RHSA-2026:34608 |
| Streams for Apache Kafka 3.2.0 | Fixed | RHSA-2026:13571 |
Not affected: 2 products
- Red Hat Enterprise Linux 9
- Red Hat Trusted Artifact Signer
Timeline
- 2026-10-02 Threatist record created from CVE-2026-27980
- 2026-10-03 Alias added: GHSA-3x4c-7xq6-9pq8
- 2026-10-08 Affected versions changed · Red Hat
References
Advisory 2
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-2026-27980 · CVE Program
- CVE-2026-27980 · NVD
- FIRST EPSS
- GHSA-3x4c-7xq6-9pq8 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-27980 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences