Vulnerability Details CVE-2026-45692
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 4.1%
CVSS Severity
CVSS v3 Score 5.4
References
Products affected by CVE-2026-45692
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cpe:2.3:a:caddyserver:caddy:2.10.0
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cpe:2.3:a:caddyserver:caddy:2.10.1
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cpe:2.3:a:caddyserver:caddy:2.10.2
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cpe:2.3:a:caddyserver:caddy:2.11.0
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cpe:2.3:a:caddyserver:caddy:2.11.1
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cpe:2.3:a:caddyserver:caddy:2.11.2
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cpe:2.3:a:caddyserver:caddy:2.4.0
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cpe:2.3:a:caddyserver:caddy:2.4.1
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cpe:2.3:a:caddyserver:caddy:2.4.2
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cpe:2.3:a:caddyserver:caddy:2.4.3
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cpe:2.3:a:caddyserver:caddy:2.4.4
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cpe:2.3:a:caddyserver:caddy:2.4.5
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cpe:2.3:a:caddyserver:caddy:2.4.6
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cpe:2.3:a:caddyserver:caddy:2.5.0
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cpe:2.3:a:caddyserver:caddy:2.5.1
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cpe:2.3:a:caddyserver:caddy:2.5.2
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cpe:2.3:a:caddyserver:caddy:2.6.0
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cpe:2.3:a:caddyserver:caddy:2.6.1
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cpe:2.3:a:caddyserver:caddy:2.6.2
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cpe:2.3:a:caddyserver:caddy:2.6.3
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cpe:2.3:a:caddyserver:caddy:2.6.4
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cpe:2.3:a:caddyserver:caddy:2.7.0
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cpe:2.3:a:caddyserver:caddy:2.7.1
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cpe:2.3:a:caddyserver:caddy:2.7.2
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cpe:2.3:a:caddyserver:caddy:2.7.3
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cpe:2.3:a:caddyserver:caddy:2.7.4
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cpe:2.3:a:caddyserver:caddy:2.7.5
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cpe:2.3:a:caddyserver:caddy:2.7.6
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cpe:2.3:a:caddyserver:caddy:2.8.0
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cpe:2.3:a:caddyserver:caddy:2.8.1
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cpe:2.3:a:caddyserver:caddy:2.8.2
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cpe:2.3:a:caddyserver:caddy:2.8.3
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cpe:2.3:a:caddyserver:caddy:2.8.4
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cpe:2.3:a:caddyserver:caddy:2.9.0
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cpe:2.3:a:caddyserver:caddy:2.9.1