Detections
Analytics

SCA: security update for @opennextjs/cloudflare (GHSA-c7mq-gh6q-6q7c)

high Tenable Self-Hosted Container Security Plugin ID 438411

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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.
 (CVE-2026-3125)

See Also

https://github.com/advisories/GHSA-c7mq-gh6q-6q7c

Plugin Details

Severity: High

ID: 438411

Version: Revision 1.10

Type: Local

Family: SCA Checks

Published: 3/5/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 2.1

Percentile: 7.71

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2026-3125

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 7.7

Threat Score: 4.4

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:H/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 3/5/2026

Vulnerability Publication Date: 3/4/2026

Reference Information

CVE: CVE-2026-3125