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VULNERABILITIES

CVE-2026-28808 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA: redhat-SADPCVSS-B:7.4 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://access.redhat.com/security/cve/CVE-2026-28808 redhat-SADP
https://bugzilla.redhat.com/show_bug.cgi?id=2455909 redhat-SADP
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28808.json redhat-SADP
https://cna.erlef.org/cves/CVE-2026-28808.html EEFMitigationVendor Advisory
https://github.com/erlang/otp/commit/07b8f441ca711f9812fad9e9115bab3c3aa92f79 EEF

see all 10 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-551Incorrect Behavior Order: Authorization Before Parsing and Canonicalizationredhat-SADP
CWE-863Incorrect AuthorizationEEF

Affected Products

ProductVersions
erlang erlang/inets
>= 5.10, < 9.1.0.6
> 9.2, < 9.3.2.4
> 9.4, < 9.6.2

CPE

  • cpe:2.3:a:erlang:erlang/inets:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
erlang erlang/otp
>= 17.0, < 26.2.5.19
>= 27.0, < 27.3.4.10
>= 28.0, < 28.4.2

CPE

  • cpe:2.3:a:erlang:erlang/otp:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

9 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-28808
NVD Published Date:
Apr 7, 2026
NVD Last Modified:
Sep 8, 2026
Source:
EEF
CVE-2026-28808 Details - Not Deferred