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CVE-2026-28808
CRITICAL · CVSS 9.8
EPSS exploitation probability: 0%
Published 2026-04-07T13:16:46.320 · Last modified 2026-06-30T03:18:03.163

Summary

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 5.1

Affected products

erlang — erlang\/inets

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.