CVE-2026-64644 Details
Description
Next.js is a React framework for building full-stack web applications. In versions 15.5.0 through 15.5.20 and 16.0.0 through 16.2.10, when self-hosting Next.js with the default image loader, the Image Optimization API can optimize remotely hosted images if configured (not enabled by default). If those images contain malicious content, they can cause CPU exhaustion in /_next/image endpoints.Only config.images.remotePatterns is affected, and just the patterns in that array, whereas config.images.unoptimized: true, config.images.loader: 'custom', and Vercel are not impacted. This issue has been fixed in versions 15.5.21 and 16.2.11.
A denial-of-service vulnerability has been identified in Next.js versions 15.5.0 prior to 15.5.21 and 16.0.0 prior to 16.2.11. When self-hosting Next.js with the default image loader, the Image Optimization API can be configured to optimize remotely hosted images. If these images contain malicious content, they can lead to CPU exhaustion on the '/_next/image' endpoints. This issue specifically affects users with 'config.images.remotePatterns' enabled, while 'config.images.unoptimized: true', 'config.images.loader: custom', and Vercel users are not impacted.
Users can upgrade to Next.js versions 15.5.21 or 16.2.11 to address this vulnerability. If an immediate upgrade is not possible, the 'config.experimental.imgOptSkipMetadata' option can be set to true as a temporary workaround.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 27, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/vercel/next.js/commit/93cb90891402fa4c47798d03cb9e05c13233766c | [email protected] | Patch |
| https://github.com/vercel/next.js/pull/96006 | [email protected] | Issue TrackingPatch |
| https://github.com/vercel/next.js/releases/tag/v15.5.21 | [email protected] | ProductRelease Notes |
| https://github.com/vercel/next.js/releases/tag/v16.2.11 | [email protected] | ProductRelease Notes |
| https://github.com/vercel/next.js/security/advisories/GHSA-q8wf-6r8g-63ch | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-407 | Inefficient Algorithmic Complexity | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| vercel next.js | >= 15.5.0, < 15.5.21 >= 16.0.0, < 16.2.11 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 29, 2026 | Initial Analysis | [email protected] |
| Jul 27, 2026 | CVE Modified | CISA-ADP |
| Jul 27, 2026 | New CVE Received | [email protected] |