CVE-2026-28808— ScriptAlias CGI targets bypass directory auth in inets httpd (mod_auth vs mod_cgi path mismatch)
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I. Basic Information for CVE-2026-28808
Vulnerability Information
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Vulnerability Title
ScriptAlias CGI targets bypass directory auth in inets httpd (mod_auth vs mod_cgi path mismatch)
Source: NVD (National Vulnerability Database)
Vulnerability Description
Incorrect Authorization vulnerability in Erlang OTP (inets modules) allows unauthenticated access to CGI scripts protected by directory rules when served via script_alias. When script_alias maps a URL prefix to a directory outside DocumentRoot, mod_auth evaluates directory-based access controls against the DocumentRoot-relative path while mod_cgi executes the script at the ScriptAlias-resolved path. This path mismatch allows unauthenticated access to CGI scripts that directory rules were meant to protect. This vulnerability is associated with program files lib/inets/src/http_server/mod_alias.erl, lib/inets/src/http_server/mod_auth.erl, and lib/inets/src/http_server/mod_cgi.erl. This issue affects OTP from OTP 17.0 until OTP 28.4.2, 27.3.4.10 and 26.2.5.19 corresponding to inets from 5.10 until 9.6.2, 9.3.2.4 and 9.1.0.6.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制不正确
Source: NVD (National Vulnerability Database)
Vulnerability Title
Erlang/OTP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Erlang/OTP是Erlang/OTP开源的一个JavaScript编写的处理处理异常的库。该库可以捕捉node.js内置API引发的异常。 Erlang/OTP 28.4.2之前版本、27.3.4.10之前版本和26.2.5.19之前版本存在安全漏洞，该漏洞源于inets模块中授权不当，可能导致未经身份验证访问受目录规则保护的CGI脚本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-28808
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Same Patch Batch · Erlang · 2026-04-07 · 3 CVEs total
| CVE-2026-32144 | OCSP designated-responder authorization bypass via missing signature verification | |
| CVE-2026-28810 | Predictable DNS Transaction IDs Enable Cache Poisoning in Built-in Resolver |
IV. Related Vulnerabilities
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SFTP chroot bypass via path traversal in SSH_FXP_FSETSTAT - CVE-2026-32144
OCSP designated-responder authorization bypass via missing s - CVE-2026-28810
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Request smuggling via first-wins Content-Length parsing in i - CVE-2026-23943
Pre-auth SSH DoS via unbounded zlib inflate
Same vendor: Erlang
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Predictable DNS Transaction IDs Enable Cache Poisoning in Bu - CVE-2026-23941
Request smuggling via first-wins Content-Length parsing in i - CVE-2026-23943
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Same weakness: CWE-863
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