CVE-2026-44577
Next.js: Denial of Service in the Image Optimization API
CVSS Score
5.9
EPSS Score
0.7%
EPSS Percentile
49th
Next.js is a React framework for building full-stack web applications. From 10.0.0 to before 15.5.16 and 16.2.5, when self-hosting Next.js with the default image loader, the Image Optimization API fetches local images entirely into memory without enforcing a maximum size limit. An attacker could cause out-of-memory conditions by requesting large local assets from the /_next/image endpoint that match the images.localPatterns configuration (by default, all patterns are allowed). This vulnerability is fixed in 15.5.16 and 16.2.5.
| CWE | CWE-770 |
| Vendor | vercel |
| Product | next.js |
| Published | May 13, 2026 |
| Last Updated | Jul 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
vercel / next.js
>= 10.0.0, < 15.5.16 >= 16.0.0, < 16.2.5
References
github.com: https://github.com/vercel/next.js/security/advisories/GHSA-h64f-5h5j-jqjh access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-44577 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2477194 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44577.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:40974 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:37272 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:34608