GO-2026-6512 Vulnerabilities in handler/placeholder layer in github.com/caddyserver/caddy

Rewrite placeholder re-expansion, unbounded body buffer DoS, and fileHidden case-sensitivity bypass in github.com/caddyserver/caddy...

CVE-2026-91865

A small WS-Policy document using repeated policy references can force Neethi to re-expand the same references exponentially during normalization, consuming huge amounts of CPU and memory denial of service. Users are recommended to upgrade to version 3.2.4, which fixes this issue...

Caddy: rewrite placeholder re-expansion, unbounded body buffer DoS, and fileHidden case-sensitivity bypass

Caddy v2.11.3 — Three vulnerabilities in handler/placeholder layer Tested against: caddy:2.11.3 official Docker image, SHA verified at runtime Reproduction environment: Docker Desktop 4.73.1 / Engine 29.4.3 on Windows 10 host, isolated containers, no network egress required for any of the exploit...

GHSA-J8PX-RMRX-76H9 Caddy: rewrite placeholder re-expansion, unbounded body buffer DoS, and fileHidden case-sensitivity bypass

Caddy v2.11.3 — Three vulnerabilities in handler/placeholder layer Tested against: caddy:2.11.3 official Docker image, SHA verified at runtime Reproduction environment: Docker Desktop 4.73.1 / Engine 29.4.3 on Windows 10 host, isolated containers, no network egress required for any of the exploit...

CVE-2026-77281 Caddy: rewrite placeholder re-expansion

Caddy is an extensible server platform that uses TLS by default. In version 2.11.3 and earlier, three configuration-dependent weaknesses affect the handler and placeholder layer. In modules/caddyhttp/rewrite/rewrite.go, Rewrite.Rewrite can pass attacker-controlled replacement bytes through...

CVE-2026-77281 Caddy: rewrite placeholder re-expansion

Caddy is an extensible server platform that uses TLS by default. In version 2.11.3 and earlier, three configuration-dependent weaknesses affect the handler and placeholder layer. In modules/caddyhttp/rewrite/rewrite.go, Rewrite.Rewrite can pass attacker-controlled replacement bytes through...

CVE-2026-77281 Caddy: rewrite placeholder re-expansion

Caddy is an extensible server platform that uses TLS by default. In version 2.11.3 and earlier, three configuration-dependent weaknesses affect the handler and placeholder layer. In modules/caddyhttp/rewrite/rewrite.go, Rewrite.Rewrite can pass attacker-controlled replacement bytes through...