CVE-2026-52846

Caddy is an extensible server platform that uses TLS by default. Prior to 2.11.4, Caddy’s stripHTML template function cannot reliably remove all HTML tags from input strings. Certain malformed HTML, such as img src=x onerror=alert, can bypass the tag-stripping logic, potentially leaving dangerous...

CVE-2026-52844

Caddy is an extensible server platform that uses TLS by default. Prior to 2.11.4, on Windows, Caddy path matchers treat /private\secret.txt as outside /private/, but fileserver later resolves the same request path as private\secret.txt on disk. An unauthenticated remote client can bypass Caddy...

CVE-2026-52845

Caddy is an extensible server platform that uses TLS by default. Prior to 2.11.4, forwardauth copyheaders deletes the exact client-supplied identity header before copying the trusted value from the auth gateway. But when the request later goes through phpfastcgi, Caddy normalizes HTTP headers int...

CVE-2026-45692

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...

CVE-2026-45135

Caddy is an extensible server platform that uses TLS by default. From 2.7.0 until 2.11.3, the FastCGI transport's splitPos in modules/caddyhttp/reverseproxy/fastcgi/fastcgi.go misuses golang.org/x/text/search with search.IgnoreCase when the request path contains a non-ASCII byte. Two distinct fla...

CVE-2026-45135

Caddy is an extensible server platform that uses TLS by default. From 2.7.0 until 2.11.3, the FastCGI transport's splitPos in modules/caddyhttp/reverseproxy/fastcgi/fastcgi.go misuses golang.org/x/text/search with search.IgnoreCase when the request path contains a non-ASCII byte. Two distinct fla...

CVE-2026-45135

CVE-2026-45135 (Caddy) describes two Unicode bypass flaws in the FastCGI splitPos logic (modules/caddyhttp/reverseproxy/fastcgi/fastcgi.go) that mis-use golang.org/x/text/search with IgnoreCase when a non-ASCII byte appears in the request path. This can cause a non-.php file to be treated as a sc...

CVE-2026-45135 Caddy: Unsafe Unicode Handling in FastCGI splitPos Allows Execution of Non-PHP Files

Caddy is an extensible server platform that uses TLS by default. From 2.7.0 until 2.11.3, the FastCGI transport's splitPos in modules/caddyhttp/reverseproxy/fastcgi/fastcgi.go misuses golang.org/x/text/search with search.IgnoreCase when the request path contains a non-ASCII byte. Two distinct fla...

CVE-2026-45692

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...

CVE-2026-45692

CVE-2026-45692 (Caddy) describes a remote admin authorization bypass where the /config traversal layer and the authorization layer disagree on the target object. Specifically, from 2.4.0 through 2.11.3, an authorized path such as /config/apps/http/servers/srv/routes/0 could be used to access or m...

CVE-2026-52845

Summary (CVE-2026-52845): Caddy 2.11.x contains a bypass in forward_auth copy_headers where, prior to 2.11.4, the exact client-supplied header was deleted but HTTP header names are later normalized to CGI variables, allowing an underscore alias to collide with a trusted header in FastCGI backends...

CVE-2026-52844

CVE-2026-52844 describes a Windows-specific path handling bug in Caddy prior to 2.11.4 where path matchers do not normalize backslashes, causing a request like /private%5csecret.txt to bypass path-scoped auth and reach the protected file, e.g., /private/*, through file_server. The issue is exploi...

EUVD-2026-38557

Caddy is an extensible server platform that uses TLS by default. Prior to 2.11.4, on Windows, Caddy path matchers treat /private\secret.txt as outside /private/, but fileserver later resolves the same request path as private\secret.txt on disk. An unauthenticated remote client can bypass Caddy...

CVE-2026-52846

Summary: CVE-2026-52846 affects Caddy's stripHTML template function, which cannot reliably strip certain malformed HTML (e.g., <img src=x onerror=alert()>). This can bypass tag-stripping and may enable client-side XSS when untrusted strings are rendered as HTML. The issue originates in func...

Caddy 2.4.6 - Open Redirect

Caddy 2.4.6 contains an open redirect vulnerability. An attacker can redirect a user to a malicious site via a crafted URL and possibly obtain sensitive information, modify data, and/or execute unauthorized operations. id: CVE-2022-28923 info: name: Caddy 2.4.6 - Open Redirect author: Sascha...

Caddy: stripHTML template function bypass

Summary Caddy’s stripHTML template function cannot reliably remove all HTML tags from input strings. Certain malformed HTML, such as img src=x onerror=alert, can bypass the tag-stripping logic, potentially leaving dangerous content in the output if it is later rendered as HTML. This may allow...

Caddy: Windows `file_server` path authorization bypass via encoded backslash

Summary On Windows, Caddy path matchers treat /private\secret.txt as outside /private/, but fileserver later resolves the same request path as private\secret.txt on disk. An unauthenticated remote client can request /private%5csecret.txt and bypass Caddy path-scoped auth/deny routes protecting...

PT-2026-50162

Name of the Vulnerable Software and Affected Versions Caddy versions prior to 2.11.4 Description The stripHTML template function, specifically within the funcStripHTML function, fails to reliably remove all HTML tags from input strings. Malformed HTML can bypass the tag-stripping logic, which may...

PT-2026-50160

Name of the Vulnerable Software and Affected Versions Caddy versions prior to 2.11.4 Description On Windows, a mismatch exists between how Caddy path matchers and the file server handle request paths. The MatchPath.MatchWithError function compares the r.URL.Path using URL path semantics and does...

FreeBSD : caddy -- multiple vulnerabilities (94f93681-6775-11f1-8044-002590af0794)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 94f93681-6775-11f1-8044-002590af0794 advisory. Caddy project reports: Caddy 2.11.4 contains multiple security fixes. GitHub Security Advisory...