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.
Published: 2026-06-23
Score: 5.4 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-x5w9-xh9r-mvfc Caddy: Remote Admin Authorization Bypass in `/config` API via Array Index Normalization
History

Thu, 09 Jul 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-551
References
Metrics threat_severity

None

threat_severity

Moderate


Fri, 26 Jun 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 23 Jun 2026 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Caddyserver
Caddyserver caddy
Vendors & Products Caddyserver
Caddyserver caddy

Tue, 23 Jun 2026 18:15:00 +0000

Type Values Removed Values Added
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
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'}


Subscriptions

Caddyserver Caddy
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-26T18:16:37.211Z

Reserved: 2026-05-13T04:38:01.164Z

Link: CVE-2026-45692

cve-icon Vulnrichment

Updated: 2026-06-26T18:15:48.785Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-06-23T17:55:11Z

Links: CVE-2026-45692 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-07-16T00:45:04Z

Weaknesses