CVE-2026-30852

Katalog CVE

CVSS 7.5 · High EPSS 0,51%

Kerentanan Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') pada caddyserver caddy. Skor CVSS 3.1 7.5 (High) menurut NVD.

Deskripsi (NVD)

Caddy is an extensible server platform that uses TLS by default. From version 2.7.5 to before version 2.11.2, the vars_regexp matcher in vars.go:337 double-expands user-controlled input through the Caddy replacer. When vars_regexp 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 means an attacker can put {env.DATABASE_URL} or {file./etc/passwd} in a request header and the server will evaluate it, leaking environment variables, file contents, and system info. This issue has been patched in version 2.11.2.

Rincian

Terbit di NVD

7 Maret 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

7.5 (High), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

EPSS (30 hari)

0,51% peluang dieksploitasi; lebih tinggi dari 41,5% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/caddyserver/caddy/security/advisories/GHSA-m2w3-8f23-hxxf exploit · mitigasi · advisory vendor
• https://github.com/caddyserver/caddy/pull/5408 issue tracking · patch
• https://github.com/caddyserver/caddy/releases/tag/v2.11.2 product · release notes