CVE-2026-28808
Full vulnerability record from the local CVENow database.
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 before OTP 26.2.5.19, OTP 27.3.4.10, and OTP 28.4.2, corresponding to inets from 5.10 before 9.1.0.6, 9.3.2.4, and 9.6.2. Whether OTP before OTP 17.0, corresponding to inets before 5.10, is affected is unknown.
Severity
HIGH
CVSS score
8.3
(v4.0)
Vulnerability status
Modified
Source identifier
6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Published
2026-04-07 13:16:46.320000
Last modified
2026-10-26 22:10:00.163000
View original CVE JSON
{
"id": "CVE-2026-28808",
"sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"published": "2026-04-07T13:16:46.320",
"lastModified": "2026-10-26T22:10:00.163",
"vulnStatus": "Modified",
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"lang": "en",
"value": "Incorrect Authorization vulnerability in Erlang OTP (inets modules) allows unauthenticated access to CGI scripts protected by directory rules when served via script_alias.\n\nWhen 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.\n\nThis 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.\n\nThis issue affects OTP from OTP 17.0 before OTP 26.2.5.19, OTP 27.3.4.10, and OTP 28.4.2, corresponding to inets from 5.10 before 9.1.0.6, 9.3.2.4, and 9.6.2. Whether OTP before OTP 17.0, corresponding to inets before 5.10, is affected is unknown."
},
{
"lang": "es",
"value": "Una vulnerabilidad de autorización incorrecta en Erlang OTP (módulos inets) permite acceso no autenticado a scripts CGI protegidos por reglas de directorio cuando se sirven a través de script_alias.\n\nCuando script_alias mapea un prefijo de URL a un directorio fuera de DocumentRoot, mod_auth evalúa los controles de acceso basados en directorio contra la ruta relativa a DocumentRoot mientras mod_cgi ejecuta el script en la ruta resuelta por ScriptAlias. Esta falta de coincidencia de rutas permite acceso no autenticado a scripts CGI que las reglas de directorio estaban destinadas a proteger.\n\nEsta vulnerabilidad está asociada con los archivos de programa lib/inets/src/http_server/mod_alias.erl, lib/inets/src/http_server/mod_auth.erl, y lib/inets/src/http_server/mod_cgi.erl.\n\nEste problema afecta a OTP desde OTP 17.0 hasta OTP 28.4.2, 27.3.4.10 y 26.2.5.19 correspondiente a inets desde 5.10 hasta 9.6.2, 9.3.2.4 y 9.1.0.6."
}
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