CVE-2026-45692
Caddy: Remote Admin Authorization Bypass in `/config` API via Array Index Normalization
Description
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.
INFO
Published Date :
June 23, 2026, 5:55 p.m.
Last Modified :
June 23, 2026, 5:55 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Solution
- Update Caddy to version 2.11.3 or later.
- Verify authorization and config object resolutions.
- Apply security patches promptly.
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