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...

GHSA-3H23-RRPC-3P87 Caddy Defender trusted proxy client IP bypass

Impact Caddy Defender used r.RemoteAddr when evaluating whether a request should be blocked. RemoteAddr is the address of the immediate peer connected to Caddy. In deployments where Caddy is behind a trusted proxy, CDN, or load balancer, the immediate peer is usually the proxy, not the original...

GHSA-GX7W-56W6-G48X Caddy: Remote Admin Authorization Bypass on PKI Endpoints via Prefix-Based Path Matching

AI Disclosure I used an LLM to help review the source code, reason about attack surface, and help draft and refine this report. I manually validated the finding by reproducing it locally, confirming the vulnerable code path, and verifying the HTTP behavior with curl -v. Summary Caddy's remote adm...

Caddy: Remote Admin Authorization Bypass on PKI Endpoints via Prefix-Based Path Matching

AI Disclosure I used an LLM to help review the source code, reason about attack surface, and help draft and refine this report. I manually validated the finding by reproducing it locally, confirming the vulnerable code path, and verifying the HTTP behavior with curl -v. Summary Caddy's remote adm...

Caddy CVE-2026-30852 Fix Bypass

TL;DR CVE-2026-30852 fixed double expansion in varsregexp when the variable key is a placeholder e.g. http.vars.x. The fix does NOT protect literal key names e.g. tenantid. An attacker injects env.AWSSECRETACCESSKEY or file./etc/passwd via a request header → Caddy expands it on the second pass →...

GHSA-WWHQ-W58M-W29C Caddy CVE-2026-30852 Fix Bypass

TL;DR CVE-2026-30852 fixed double expansion in varsregexp when the variable key is a placeholder e.g. http.vars.x. The fix does NOT protect literal key names e.g. tenantid. An attacker injects env.AWSSECRETACCESSKEY or file./etc/passwd via a request header → Caddy expands it on the second pass →...

GHSA-X5W9-XH9R-MVFC Caddy: Remote Admin Authorization Bypass in `/config` API via Array Index Normalization

This report is not about a normal textual prefix-expansion case. The issue here is that 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 confi...

PT-2026-42048

Impact Caddy Defender used r.RemoteAddr when evaluating whether a request should be blocked. RemoteAddr is the address of the immediate peer connected to Caddy. In deployments where Caddy is behind a trusted proxy, CDN, or load balancer, the immediate peer is usually the proxy, not the original...

GHSA-M675-2P33-XV9G Caddy: Unsafe Unicode Handling in FastCGI splitPos Allows Execution of Non-PHP Files

Summary 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 flaws in that fallback let an attacker mislead Caddy's FastCGI splitting into treatin...

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

Summary 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 flaws in that fallback let an attacker mislead Caddy's FastCGI splitting into treatin...

Improper Handling of Case Sensitivity

Overview Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity through improper handling of Unicode characters in the splitPos function. An attacker can execute arbitrary code by uploading a file with a specially crafted name containing non-ASCII bytes or Unico...

CVE-2026-45135

creationtimestamp| type| source ---|---|--- 2026-05-13 14:39:28+00:00| published-proof-of-concept| https://github.com/caddyserver/caddy/security/advisories/GHSA-m675-2p33-xv9g...

Moderate: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

An update for Red Hat Hardened Images RPMs is now available. This update includes the following RPMs: caddy: caddy-2.11.3-0.1.hum1 aarch64, x8664 caddy-2.11.3-0.1.hum1.src src...

CVE-2026-41889 vulnerabilities

Vulnerabilities for packages: src, dapr, temporal-fips, seaweedfs, juicefs, step-ca-fips, cloudprober-fips, keda, openfga-fips, sftpgo-plugin-eventsearch, spicedb-fips, sqlexporter-fips, bento-fips, keda-fips, pgtimetable, vault, opentelemetry-collector-contrib-fips, vault-fips, envoy-gateway-fip...

Improper Certificate Validation

Caddy is vulnerable to Improper Certificate Validation. The vulnerability is due to swallowed errors in ClientAuthentication.provision, where failures loading trustedcacertfile or trustedcacertspemfiles are ignored, causing mTLS authentication to fail open and accept any client certificate signed...

Improper Access Control

Caddy is vulnerable to Improper Access Control. The vulnerability is due to incorrect case-insensitive matching in the HTTP path request matcher when percent-encoded sequences are present, allowing attackers to alter request path casing and bypass path-based routing or attached access controls...

Improper Access Control

Caddy is vulnerable to Improper Access Control. The vulnerability is due to incorrect case-insensitive matching in the HTTP host request matcher when large host lists are configured, allowing attackers to modify the casing of the Host header and bypass host-based routing or associated access...

BIT-AUTHENTIK-2026-25748 authentik has a forward authentication bypass with broken cookie

authentik is an open-source identity provider. Prior to 2025.10.4 and 2025.12.4, with a malformed cookie it was possible to bypass authentication when using forward authentication in the authentik Proxy Provider when used in conjunction with Traefik or Caddy as reverse proxy. When a malicious...

GHSA-Q4R8-XM5F-56GW vulnerabilities

Vulnerabilities for packages: caddy...

CVE-2026-30836 vulnerabilities

Vulnerabilities for packages: caddy...