CVE-2025-57752
Description
A cache key confusion vulnerability in Next.js Image Optimization API could cause header-dependent images (e.g., using Cookie or Authorization) to be incorrectly cached and served to unauthorized users.
Binary-Affected: Next.js Upstream-version-introduced: v14.2.30 Upstream-version-fixed: v15.4.5 and v14.2.31
Statement
This vulnerability is considered Moderate because it only impacts applications that both (1) serve images through API routes where responses vary based on sensitive request headers, and (2) have image optimization enabled. In most common Next.js deployments, static images or header-independent responses are used, meaning the bug has no effect. Additionally, the exposure is limited to cached image content rather than direct access to underlying APIs or application data. Since it does not allow arbitrary code execution, privilege escalation, or broad data leakage by default, the impact is constrained to specific configurations, making it a Moderate issue rather than a Important flaw.
Mitigation
As a mitigation, developers/admins should avoid serving images that depend on sensitive request headers (such as Cookie or Authorization) through the Image Optimization API. Instead, these images can be served directly without optimization or with caching disabled to prevent unintended exposure to unauthorized users.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.2 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | None | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | High | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | None | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Application Data
Frequently Asked Questions
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