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CVE-2026-28808

nvd nist
Published: Apr 7, 2026Modified: Jul 24, 2026

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8.3
Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db (Secondary)

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 28.4.2, OTP 27.3.4.10 and OTP 26.2.5.19, corresponding to inets from 5.10 before 9.6.2, 9.3.2.4 and 9.1.0.6.

Affected (6)

Erlang
2 products
Erlang/inets
Erlang/otp
Configuration A
6 vulnerable
Vulnerable SoftwareAffected Versions
Erlang
Erlang/inets
After 9.2 to 9.3.2.4
Erlang/inets
After 9.4 to 9.6.2
Erlang/inets
From 5.10 to 9.1.0.6
Erlang
Erlang/otp
From 17.0 to 26.2.5.19
Erlang/otp
From 27.0 to 27.3.4.10
Erlang/otp
From 28.0 to 28.4.2

Related CWEs

CWE-551
Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
If 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.
CWE-863
Incorrect Authorization
The product 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.

References (9)

Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
MitigationVendor Advisory
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Patch
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Patch
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Third Party Advisory
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
PatchThird Party Advisory
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Product
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

Timeline

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