Caddy is an extensible server platform that uses TLS by default.

Code

The project this record applies to. Exploit listings stay in References.

• Repository · github.com

Timeline

Detection, updates, and resolution for this record.

1. Feb 24, 2026 · NIST NVD

   Detected

   Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's HTTP request matcher is intended to be case-insensitive, but when the match pattern contains percent-escape sequences ( ) it compares against the request's escaped path without lowercasing. An attacker can bypass path-based routing and any access controls attached to that route by changing the casing

2. Jun 17, 2026 · NIST NVD

   Updated

   Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's HTTP request matcher is intended to be case-insensitive, but when the match pattern contains percent-escape sequences ( ) it compares against the request's escaped path without lowercasing. An attacker can bypass path-based routing and any access controls attached to that route by changing the casing

Affected

• cpe caddyserver/caddyversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-27587

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-27587

  Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's HTTP request matcher is intended to be case-insensitive, but when the match pattern contains percent-escape sequences ( ) it compares against the request's escaped path wi

  nvd.nist.gov

References

• Release Notes · github.com
• Exploit · github.com