#VU125777 Incorrect authorization in otp - CVE-2026-28808
Published: April 10, 2026
Vulnerability identifier: #VU125777
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-28808
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
otp
otp
Software vendor:
erlang
erlang
Description
The vulnerability allows a remote attacker to bypass authorization checks and access protected CGI scripts.
The vulnerability exists due to incorrect authorization in mod_auth and mod_cgi path resolution when handling requests to script_alias CGI targets located outside DocumentRoot. A remote attacker can send a request to a script_alias URL to bypass authorization checks and access protected CGI scripts.
Exploitation requires script_alias to map a URL prefix to a CGI directory outside DocumentRoot while directory-based access controls are configured to protect that external directory.
Remediation
Install security update from vendor's website.