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CVE-2026-28808

nvd nist
Published: Apr 7, 2026Modified: Sep 8, 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 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 (6)

Erlang
2 products
Erlang/inets
Erlang/otp
Configuration A
6 vulnerable
Vulnerable SoftwareAffected Versions
Erlang
Erlang/inets
9.2 < version < 9.3.2.4
Erlang/inets
9.4 < version < 9.6.2
Erlang/inets
5.10 ≤ version < 9.1.0.6
Erlang
Erlang/otp
17.0 ≤ version < 26.2.5.19
Erlang/otp
27.0 ≤ version < 27.3.4.10
Erlang/otp
28.0 ≤ version < 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 (10)

Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
MitigationVendor Advisory
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
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

No history available yet.