CVE-2026-45692
Caddy: Remote Admin Authorization Bypass in `/config` API via Array Index Normalization
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-187 CWE-863 |
| Vendor | caddyserver |
| Product | caddy |
| Published | Jun 23, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
caddyserver / caddy
>= 2.4.0, < 2.11.3