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.
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History
Tue, 23 Jun 2026 18:15:00 +0000
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| 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. | |
| Title | Caddy: Remote Admin Authorization Bypass in `/config` API via Array Index Normalization | |
| Weaknesses | CWE-187 CWE-863 |
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cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-23T17:55:11.317Z
Reserved: 2026-05-13T04:38:01.164Z
Link: CVE-2026-45692
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
Updated: 2026-06-23T21:15:07Z