CVE-2026-3125

Katalog CVE

CVSS 6.5 · Medium EPSS 0,44%

Kerentanan Use of Incorrectly-Resolved Name or Reference pada opennextjs opennext for cloudflare. Skor CVSS 3.1 6.5 (Medium) menurut NVD.

Deskripsi (NVD)

A Server-Side Request Forgery (SSRF) vulnerability was identified in the @opennextjs/cloudflare package, resulting from a path normalization bypass in the /cdn-cgi/image/ handler.The @opennextjs/cloudflare worker template includes a /cdn-cgi/image/ handler intended for development use only. In production, Cloudflare's edge intercepts /cdn-cgi/image/ requests before they reach the Worker. However, by substituting a backslash for a forward slash (/cdn-cgi\image/ instead of /cdn-cgi/image/), an attacker can bypass edge interception and have the request reach the Worker directly. The JavaScript URL class then normalizes the backslash to a forward slash, causing the request to match the handler and trigger an unvalidated fetch of arbitrary remote URLs. For example: https://victim-site.com/cdn-cgi\image/aaaa/https://attacker.com In this example, attacker-controlled content from attacker.com is served through the victim site's domain (victim-site.com), violating the same-origin policy and potentially misleading users or other services. Note: This bypass only works via HTTP clients that preserve backslashes in paths (e.g., curl --path-as-is). Browsers normalize backslashes to forward slashes before sending requests. Additionally, Cloudflare Workers with Assets and Cloudflare Pages suffer from a similar vulnerability. Assets stored under /cdn-cgi/ paths are not publicly accessible under normal conditions. However, using the same backslash bypass (/cdn-cgi\... instead of /cdn-cgi/...), these assets become publicly accessible. This could be used to retrieve private data. For example, Open Next projects store incremental cache data under /cdn-cgi/_next_cache, which could be exposed via this bypass.

Rincian

Terbit di NVD

4 Maret 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

6.5 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-706: Use of Incorrectly-Resolved Name or Reference
CWE-918: Server-Side Request Forgery (SSRF)

EPSS (30 hari)

0,44% peluang dieksploitasi; lebih tinggi dari 36,7% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/opennextjs/opennextjs-cloudflare/pull/1147 issue tracking · patch
• https://github.com/advisories/GHSA-rvpw-p7vw-wj3m advisory pihak ketiga
• https://www.cve.org/cverecord?id=CVE-2025-6087 advisory pihak ketiga
• https://www.npmjs.com/package/@opennextjs/cloudflare/v/1.17.1 product · release notes