Incorrect authorization in Caddy - #VU163180
Published: November 9, 2026
Vulnerability identifier: #VU163180
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a low-privileged remote attacker to bypass configured PKI access restrictions and read information about unauthorized certificate authorities.
The vulnerability exists due to prefix-based path authorization without path-segment boundary checks in Caddy's PKI admin endpoints when remote administration is enabled. A low-privileged remote attacker can use a client certificate restricted to /pki/ca/prod to request /pki/ca/prod-backup and retrieve that authority's information.
Affected software
Caddy
Remediation
Install security update from vendor's website.
Caddy - update to 2.11.3