There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - 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 `strings.ToLower()` can change
    UTF-8 byte length for some characters. As a result, Caddy can derive an incorrect
    `SCRIPT_NAME`/`SCRIPT_FILENAME` and `PATH_INFO`, potentially causing a request that contains `.php` to
    execute a different on-disk file than intended (path confusion). In setups where an attacker can control
    file contents (e.g., upload features), this can lead to unintended PHP execution of non-.php files
    (potential RCE depending on deployment). Version 2.11.1 fixes the issue. (CVE-2026-27590)

  - 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. Version 2.11.1
    fixes the issue. (CVE-2026-27585)

  - 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 client certificate authentication to silently fail
    open when a CA certificate file is missing, unreadable, or malformed. The server starts without error but
    accepts any client certificate signed by any system-trusted CA, completely bypassing the intended private
    CA trust boundary. Any deployment using `trusted_ca_cert_file` or `trusted_ca_certs_pem_files` for mTLS
    will silently degrade to accepting any system-trusted client certificate if the CA file becomes
    unavailable. This can happen due to a typo in the path, file rotation, corruption, or permission changes.
    The server gives no indication that mTLS is misconfigured. Version 2.11.1 fixes the vulnerability.
    (CVE-2026-27586)

  - Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's HTTP
    `path` request matcher is intended to be case-insensitive, but when the match pattern contains percent-
    escape sequences (`%xx`) it compares against the request's escaped path without lowercasing. An attacker
    can bypass path-based routing and any access controls attached to that route by changing the casing of the
    request path. Version 2.11.1 contains a fix for the issue. (CVE-2026-27587)

  - 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, but when configured with a large host list (>100
    entries) it becomes case-sensitive due to an optimized matching path. An attacker can bypass host-based
    routing and any access controls attached to that route by changing the casing of the `Host` header.
    Version 2.11.1 contains a fix for the issue. (CVE-2026-27588)

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-30852)

Linux/Unix 主機上安裝了一個或多個受到弱點影響的套件，且供應商未提供可用的修補程式。

  - Caddy 是預設使用 TLS 的可擴充伺服器平台。從版本 2.7.5 到之前 2.11.2版本，vars.go：337 中的 vars_regexp 匹配器會透過 Caddy 替換器雙倍擴展使用者控制的輸入。當 vars_regexp 與像 {http.request.header.X-Input} 這樣的佔位符匹配時，標頭值會被解析一次（預期中），然後再透過 repl 傳遞。ReplaceAll（） 再次出現（這個錯誤）。這表示攻擊者可以放置 {env.DATABASE_URL} 或 {file./etc/passwd} 在請求標頭中，伺服器會評估該檔案，洩漏環境變數、檔案內容及系統資訊。此問題已在 2.11.2 版中修正。(CVE-2026-30852)

請注意，Nessus 依賴供應商報告的套件存在。

Linux/Unix 主机中安装的一个或多个程序包受到一个漏洞影响，而供应商没有提供补丁程序。

  - Caddy 是默认使用 TLS 的可扩展服务器平台。从版本 2.7.5 到之前 2.11.2版本，vars.go：337 中的 vars_regexp 匹配器通过 Caddy 替换器实现了用户控制输入的双倍扩展。当vars_regexp匹配到像{http.request.header.X-Input}这样的占位符时，头值会被解析一次（正常），然后通过repl传递。ReplaceAll（） 再次（bug）。这意味着攻击者可以放置{env.请求头中出现DATABASE_URL}或{file./etc/passwd}，服务器会评估该请求，泄露环境变量、文件内容和系统信息。已在版本 2.11.2 中修补此问题。(CVE-2026-30852)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

リモートの Fedora 44 ホストには、FEDORA-2026-950cac64f2 のアドバイザリに記載された複数の脆弱性の影響を受けるパッケージがインストールされています。

    caddy 本体およびベンダーライブラリにわたる 17 件の CVE を解決するセキュリティアップデート。

Tenable は、前述の記述ブロックを Fedora セキュリティアドバイザリから直接抽出しています。

Nessus はこれらの問題をテストしておらず、代わりにアプリケーションが自己報告するバージョン番号にのみ依存していることに注意してください。

Linux/Unix ホストには、ベンダーが提供するパッチが利用できない脆弱性の影響を受ける複数のパッケージがインストールされています。

  - Caddy は、デフォルトで TLS を使用する拡張可能なサーバープラットフォームです。バージョン 2.7.5 からバージョン 2.11.2以前まで、vars.go:337のvars_regexpマッチャはCaddyリプレイサーを介してユーザー制御の入力を二重拡張します。vars_regexpが{http.request.header.X-Input}のようなプレースホルダーとマッチすると、ヘッダー値は一度(予想通り)解決され、その後repl.に渡されます。ReplaceAll()を再度(バグ)とします。これは攻撃者が{env.を置くことができることを意味します。リクエストヘッダーにDATABASE_URL}または{file./etc/passwd}を付けると、サーバーはそれを評価し、環境変数、ファイル内容、システム情報をリークします。この問題には、バージョン 2.11.2 でパッチが適用されています。(CVE-2026-30852)

Nessus は、ベンダーによって報告されたパッケージの存在に依存していることに注意してください。

リモートの Fedora 43 ホストには、FEDORA-2026-3dc324bd9a のアドバイザリに記載された複数の脆弱性の影響を受けるパッケージがインストールされています。

    caddy 本体およびベンダーライブラリにわたる 22 件の CVE を解決するセキュリティアップデート。

Tenable は、前述の記述ブロックを Fedora セキュリティアドバイザリから直接抽出しています。

Nessus はこれらの問題をテストしておらず、代わりにアプリケーションが自己報告するバージョン番号にのみ依存していることに注意してください。

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-950cac64f2 advisory.

    Security update resolving 17 CVEs across both caddy itself and its vendored libraries.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

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. 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. (CVE-2026-30852)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-3dc324bd9a advisory.

    Security update resolving 22 CVEs across both caddy itself and its vendored libraries.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
439411	Alpine: caddy: security update to 2.11.2-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	2026/3/28	2026/7/2	critical
439411	Alpine: caddy: security update to 2.11.2-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	2026/3/28	2026/7/2	critical
438523	SCA: security update for github.com/caddyserver/caddy/v2/modules/caddyhttp (GHSA-m2w3-8f23-hxxf)	Tenable Cloud Security	SCA Checks	2026/3/9	2026/7/6	medium
438523	SCA: security update for github.com/caddyserver/caddy/v2/modules/caddyhttp (GHSA-m2w3-8f23-hxxf)	Tenable Self-Hosted Container Security	SCA Checks	2026/3/9	2026/7/6	medium
301659	Linux Distros 未修補的弱點：CVE-2026-30852	Nessus	Misc.	2026/3/10	2026/7/2	medium
301659	Linux Distros 未修补的漏洞：CVE-2026-30852	Nessus	Misc.	2026/3/10	2026/7/2	medium
324621	Fedora 44 : caddy (2026-950cac64f2)	Nessus	Fedora Local Security Checks	2026/7/1	2026/7/1	critical
301659	Linux Distros のパッチ未適用の脆弱性: CVE-2026-30852	Nessus	Misc.	2026/3/10	2026/7/2	medium
324614	Fedora 43 : caddy (2026-3dc324bd9a)	Nessus	Fedora Local Security Checks	2026/7/1	2026/7/1	critical
324621	Fedora 44 : caddy (2026-950cac64f2)	Nessus	Fedora Local Security Checks	2026/7/1	2026/7/1	critical
301659	Linux Distros Unpatched Vulnerability : CVE-2026-30852	Nessus	Misc.	2026/3/10	2026/7/2	medium
324614	Fedora 43 : caddy (2026-3dc324bd9a)	Nessus	Fedora Local Security Checks	2026/7/1	2026/7/1	critical

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