CVE-2026-45692 | Caddy is an extensible server platform that uses TLS by defa… | CVSS 5.4 MEDIUM

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.

Metadata

CVE ID: CVE-2026-45692
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-05-13 04:38 UTC
Published: 2026-06-23 17:55 UTC
Last updated: 2026-06-23 17:55 UTC
Primary CWE: CWE-187
CWE-187: Partial String Comparison
Vendor / Product: caddyserver / caddy
Sources: cve.org · NVD

Severity & Metrics

5.4 MEDIUM CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected products (1)

Vendor	Product	Platform	Versions
caddyserver	caddy	—	>= 2.4.0, < 2.11.3

Weakness (CWE)

CWE	Source	Description
CWE-187	cna	CWE-187: Partial String Comparison
CWE-863	cna	CWE-863: Incorrect Authorization

CVSS scores (1)

Score	Severity	Version	Source	Vector
5.4	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References (1)

https://github.com/caddyserver/caddy/security/advisories/GHSA-x5w9-xh9r-mvfc https://github.com/caddyserver/caddy/security/advisories/GHSA-x5w9-xh9r-mvfc