CVE-2026-28808
EUVD-2026-1960207.04.2026, 13:16
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.Enginsight
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| erlang | erlang/inets | 5.10 ≤ 𝑥 < 9.1.0.6 |
| erlang | erlang/inets | 9.2 < 𝑥 < 9.3.2.4 |
| erlang | erlang/inets | 9.4 < 𝑥 < 9.6.2 |
| erlang | erlang/otp | 17.0 ≤ 𝑥 < 26.2.5.19 |
| erlang | erlang/otp | 27.0 ≤ 𝑥 < 27.3.4.10 |
| erlang | erlang/otp | 28.0 ≤ 𝑥 < 28.4.2 |
𝑥
= Vulnerable software versions
Debian Releases
Ubuntu Releases
openSUSE / SLES Releases
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Common Weakness Enumeration
- CWE-863 - Incorrect AuthorizationThe software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
- CWE-551 - Incorrect Behavior Order: Authorization Before Parsing and CanonicalizationIf a web server does not fully parse requested URLs before it examines them for authorization, it may be possible for an attacker to bypass authorization protection.
References