CVE-2026-45692

MEDIUM

Caddy: Remote Admin Authorization Bypass in `/config` API via Array Index Normalization

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 5.4
EPSS 0.0017
EPSS Percentile 6.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-187 CWE-863
Status published
Products (3)
caddyserver/caddy 2.4.0 - 2.11.3
caddyserver/caddy 2.4.0 - 2.11.3Go
caddyserver/caddy >= 2.4.0, < 2.11.3
Published Jun 23, 2026
Tracked Since Jun 24, 2026