CVE-2026-30851 Caddy forward_auth copy_headers Does Not Strip Client-Supplied Headers, Allowing Identity Injection and Privilege Escalation

Caddy is an extensible server platform that uses TLS by default. From version 2.10.0 to before version 2.11.2, forwardauth copyheaders does not strip client-supplied headers, allowing identity injection and privilege escalation. This issue has been patched in version 2.11.2...

CVE-2026-30851

Caddy is an extensible server platform that uses TLS by default. From version 2.10.0 to before version 2.11.2, forwardauth copyheaders does not strip client-supplied headers, allowing identity injection and privilege escalation. This issue has been patched in version 2.11.2...

CVE-2026-30852

Caddy is an extensible server platform that uses TLS by default. From version 2.7.5 to before version 2.11.2, the varsregexp matcher in vars.go:337 double-expands user-controlled input through the Caddy replacer. When varsregexp matches against a placeholder like http.request.header.X-Input, the...

CVE-2026-30852

Caddy is an extensible server platform that uses TLS by default. From version 2.7.5 to before version 2.11.2, the varsregexp matcher in vars.go:337 double-expands user-controlled input through the Caddy replacer. When varsregexp matches against a placeholder like http.request.header.X-Input, the...

CVE-2026-30852

Caddy is an extensible server platform that uses TLS by default. From version 2.7.5 to before version 2.11.2, the varsregexp matcher in vars.go:337 double-expands user-controlled input through the Caddy replacer. When varsregexp matches against a placeholder like http.request.header.X-Input, the...

GHSA-M2W3-8F23-HXXF Caddy's vars_regexp double-expands user input, leaking env vars and files

Summary The varsregexp matcher in vars.go:337 double-expands user-controlled input through the Caddy replacer. When varsregexp matches against a placeholder like http.request.header.X-Input, the header value gets resolved once expected, then passed through repl.ReplaceAll again the bug. This mean...

Header Injection

Overview Affected versions of this package are vulnerable to Header Injection in the parseCaddyfile function. An attacker can inject arbitrary values into trusted identity headers by supplying crafted HTTP headers when authenticated with a valid token, leading to unauthorized privilege escalation...

Header Injection

Overview Affected versions of this package are vulnerable to Header Injection in the parseCaddyfile function. An attacker can inject arbitrary values into trusted identity headers by supplying crafted HTTP headers when authenticated with a valid token, leading to unauthorized privilege escalation...

Linux Distros Unpatched Vulnerability : CVE-2026-27588

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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, b...

GO-2026-4539 Caddy mTLS authentication fails open in github.com/caddyserver/caddy/v2

Caddy mTLS authentication fails open in github.com/caddyserver/caddy/v2...

GO-2026-4537 Caddy is vulnerable to cross-origin config application via local admin API /load in github.com/caddyserver/caddy/v2

Caddy is vulnerable to cross-origin config application via local admin API /load in github.com/caddyserver/caddy/v2...

SUSE 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...

SUSE CVE-2026-27589

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the local caddy admin API default listen 127.0.0.1:2019 exposes a state-changing POST /load endpoint that replaces the entire running configuration. When origin enforcement is not enabled enforceorigin not...

SUSE CVE-2026-27590

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's FastCGI path splitting logic computes the split index on a lowercased copy of the request path and then uses that byte index to slice the original path. This is unsafe for Unicode because...

Linux Distros Unpatched Vulnerability : CVE-2026-27585

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

Linux Distros Unpatched Vulnerability : CVE-2026-27586

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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 clie...

Linux Distros Unpatched Vulnerability : CVE-2026-27589

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the local caddy admin API default listen 127.0.0.1:2019 exposes a...

Incorrect Behavior Order: Validate Before Canonicalize

Overview Affected versions of this package are vulnerable to Incorrect Behavior Order: Validate Before Canonicalize via the splitPos function. An attacker can cause unintended execution of files by crafting URLs with specific Unicode characters that manipulate the path splitting logic, potentiall...

Cross-site Request Forgery (CSRF)

Overview Affected versions of this package are vulnerable to Cross-site Request Forgery CSRF through the adminLoad.handleLoad process. An attacker can modify the running configuration and alter server behavior by sending cross-origin requests to the local admin API when origin enforcement is not...

Cross-site Request Forgery (CSRF)

Overview Affected versions of this package are vulnerable to Cross-site Request Forgery CSRF through the adminLoad.handleLoad process. An attacker can modify the running configuration and alter server behavior by sending cross-origin requests to the local admin API when origin enforcement is not...