Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Erlang / OTP | affected 17.0 before * |
| Erlang / OTP | affected 5.10 before * |
| Erlang / OTP | affected 07b8f441ca711f9812fad9e9115bab3c3aa92f79 before * |
CWE
CWE-863
References
- https://github.com/erlang/otp/security/advisories/GHSA-3vhp-h532-mc3f
- https://cna.erlef.org/cves/CVE-2026-28808.html
- https://osv.dev/vulnerability/EEF-CVE-2026-28808
- https://www.erlang.org/doc/system/versions.html#order-of-versions
- https://github.com/erlang/otp/commit/07b8f441ca711f9812fad9e9115bab3c3aa92f79
- https://github.com/erlang/otp/commit/8fc71ac6af4fbcc54103bec2983ef22e82942688
- https://github.com/erlang/otp/commit/9dfa0c51eac97866078e808dec2183cb7871ff7c
ADP enrichment
No English description supplied.
No references supplied.
A flaw was found in Erlang OTP (inets modules). A remote unauthenticated attacker could exploit an incorrect authorization vulnerability when CGI (Common Gateway Interface) scripts are served via script_alias. This vulnerability arises from a path mismatch where access controls are evaluated against a different path than the script's execution path. This allows unauthorized access to CGI scripts intended to be protected by directory rules, potentially leading to information disclosure or the execution of unauthorized scripts.