Vulnerability · Published Aug 29, 2025 · Assigned by GitHub_M

CVE-2025-57752Next.js Affected by Cache Key Confusion for Image Optimization API Routes

Medium 6.2

In plain English

A medium-severity security flaw in next.js from vercel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.2Medium

Exploit odds (30 days)0.3%top 71.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	next	14.2.31	GHSA-g5qg-72qw-gw5v
npm	next	15.4.5	GHSA-g5qg-72qw-gw5v

Affected products (as reported)

Vendor	Product	Versions
vercel	next.js	>= 15.0.0, < 15.4.5< 14.2.31

Weakness: CWE-524 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/vercel/next.js/security/advisories/GHSA-g5qg-72qw-gw5v x_refsource_CONFIRM
https://github.com/vercel/next.js/pull/82114 x_refsource_MISC
https://github.com/vercel/next.js/commit/6b12c60c61ee80cb0443ccd20de82ca9b4422ddd x_refsource_MISC
https://vercel.com/changelog/cve-2025-57752 x_refsource_MISC