Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate 2026-06-23T17:55:11 github.com/caddyserver/caddy/v2: Caddy: Remote Admin Authorization Bypass in `/config` API via Array Index Normalization 3.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N CWE-551

Caddy is an extensible server platform that uses TLS by default. From 2.4.0 until 2.11.3, the authorization layer and the /config traversal layer do not agree on what object the path refers to. In this case, a path authorized for one config object is accepted, but then resolves to a different config object during traversal. This happens because the authorization layer uses string prefix matching and the /config traversal layer parses array indices numerically using strconv.Atoi(). This vulnerability is fixed in 2.11.3.

A flaw was found in Caddy, an extensible server platform. A remote administrator with restricted access to specific configuration objects could bypass these limitations. This occurs because the authorization system uses string prefix matching for access paths, while the configuration traversal system interprets array indices numerically. This discrepancy allows an attacker to read and modify unauthorized configuration elements, undermining the principle of least privilege in remote administration.

This Moderate-impact flaw in Caddy's remote administration API, which allows an authorization bypass due to differing interpretations of array indices, does not affect Red Hat products. The vulnerable code is not present in Red Hat's supported offerings. Mitigation for this issue is not required for Red Hat products, as the vulnerable code is not present. Red Hat Hardened Images Not affected caddy https://www.cve.org/CVERecord?id=CVE-2026-45692 https://nvd.nist.gov/vuln/detail/CVE-2026-45692 https://github.com/caddyserver/caddy/security/advisories/GHSA-x5w9-xh9r-mvfc