CVE-2026-27588 Caddy: MatchHost becomes case-sensitive for large host lists (>100), enabling host-based route/auth bypass

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's HTTP host request matcher is documented as case-insensitive, but when configured with a large host list 100 entries it becomes case-sensitive due to an optimized matching path. An attacker can bypass...

CVE-2026-27587

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's HTTP path request matcher is intended to be case-insensitive, but when the match pattern contains percent-escape sequences %xx it compares against the request's escaped path without lowercasing. An...

CVE-2026-27587 Caddy: MatchPath %xx (escaped-path) branch skips case normalization, enabling path-based route/auth bypass

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's HTTP path request matcher is intended to be case-insensitive, but when the match pattern contains percent-escape sequences %xx it compares against the request's escaped path without lowercasing. An...

CVE-2026-27587

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's HTTP path request matcher is intended to be case-insensitive, but when the match pattern contains percent-escape sequences %xx it compares against the request's escaped path without lowercasing. An...

CVE-2026-27587

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's HTTP path request matcher is intended to be case-insensitive, but when the match pattern contains percent-escape sequences %xx it compares against the request's escaped path without lowercasing. An...

CVE-2026-27586

Summary (CVE-2026-27586): Caddy prior to 2.11.1 has two swallowed errors in ClientAuthentication.provision() that cause mTLS client authentication to silently fail open when the CA certificate file is missing, unreadable, or malformed. The server starts and accepts client certs signed by any syst...

CVE-2026-27586

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, two swallowed errors in ClientAuthentication.provision cause mTLS client certificate authentication to silently fail open when a CA certificate file is missing, unreadable, or malformed. The server starts...

CVE-2026-27586 Caddy's mTLS client authentication silently fails open when CA certificate file is missing or malformed

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, two swallowed errors in ClientAuthentication.provision cause mTLS client certificate authentication to silently fail open when a CA certificate file is missing, unreadable, or malformed. The server starts...

CVE-2026-27586

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, two swallowed errors in ClientAuthentication.provision cause mTLS client certificate authentication to silently fail open when a CA certificate file is missing, unreadable, or malformed. The server starts...

CVE-2026-27585

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the path sanitization routine in file matcher doesn't sanitize backslashes which can lead to bypassing path related security protections. It affects users with specific Caddy and environment configurations...

CVE-2026-27585 Caddy's improper sanitization of glob characters in file matcher may lead to bypassing security protections

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the path sanitization routine in file matcher doesn't sanitize backslashes which can lead to bypassing path related security protections. It affects users with specific Caddy and environment configurations...

CVE-2026-27585

CVE-2026-27585 affects Caddy prior to 2.11.1 due to improper sanitization of backslashes in the file matcher’s path sanitization routine, which can bypass path-related security protections. The issue is fixed in version 2.11.1. Affected environment/configurations are specified as requiring cautio...

CVE-2026-27585

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the path sanitization routine in file matcher doesn't sanitize backslashes which can lead to bypassing path related security protections. It affects users with specific Caddy and environment configurations...

CVE-2026-27585 Caddy's improper sanitization of glob characters in file matcher may lead to bypassing security protections

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the path sanitization routine in file matcher doesn't sanitize backslashes which can lead to bypassing path related security protections. It affects users with specific Caddy and environment configurations...

Caddy 安全漏洞

Caddy is an open-source, cross-platform HTTP/Web server developed by the Caddy company. Versions of Caddy prior to 2.11.1 contained security vulnerabilities. These vulnerabilities were caused by two ignored errors in the ClientAuthentication.provision function, which led to a silent failure in mT...

Caddy 安全漏洞

Caddy is an open-source, cross-platform HTTP/Web server developed by the Caddy company. Versions of Caddy prior to 2.11.1 contained security vulnerabilities. These vulnerabilities stemmed from the HTTP host request matcher becoming case-sensitive when configuring large host lists, which could all...

Caddy 安全漏洞

Caddy is an open-source, cross-platform HTTP/Web server developed by the Caddy company. Versions of Caddy prior to 2.11.1 contained security vulnerabilities. These vulnerabilities stemmed from the HTTP path request matcher’s sensitivity to case differences when processing patterns that included...

PT-2026-21774

Name of the Vulnerable Software and Affected Versions Caddy versions prior to 2.11.1 Description The local Caddy admin API, listening by default on 127.0.0.1:2019, includes a POST /load endpoint that allows replacing the entire running configuration. When origin enforcement is not enabled enforce...

PT-2026-21773

Name of the Vulnerable Software and Affected Versions Caddy versions prior to 2.11.1 Description Caddy’s HTTP host request matcher is documented as case-insensitive, but becomes case-sensitive when configured with a large host list more than 100 entries due to an optimized matching path. An...

PT-2026-21767

Name of the Vulnerable Software and Affected Versions Caddy versions prior to 2.11.1 Description The path sanitization routine in Caddy's file matcher does not properly sanitize backslashes, potentially allowing bypass of path-related security protections. This issue affects users with specific...