---
id: CVE-2026-112256
title: Logon bypass (trust of attacker-controlled completed-methods list)
summary: >-
  Acceptance of extraneous untrusted data with trusted data vulnerability in
  OpenText Advanced Authentication Server allows Accessing Functionality Not
  Properly Constrained by ACLs.


  This issue affects Advanced Authentication Server: from …
severity: critical
cvss: 9.2
cvssVector: >-
  CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:P/AU:Y/V:C/RE:M/U:Red
cvssSource: cna
cwe:
  - CWE-349
vendor: OpenText
product: Advanced Authentication Server
affected:
  - advanced_authentication_server >= 6.4.0.0 <= 6.4.3.8
  - advanced_authentication_server >= 6.5.0.0 <= 6.5.0.10
  - advanced_authentication_server >= 6.6.0.0 <= 6.6.1.0
published: '2026-10-29'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T15:31:18.768Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-112256'
references:
  - url: 'https://docs.microfocus.com/doc/42/26.3.1/security-improvements-662'
  - url: 'https://docs.microfocus.com/doc/2582/26.3.1/security-improvements-662'
  - url: 'https://docs.microfocus.com/doc/42/6.4.3.9/security-improvements-6439'
  - url: 'https://docs.microfocus.com/doc/42/6.5.0.11/security-improvements-65011'
tags:
  - cve.org
epss: 0.00245
epssPercentile: 0.15807
ingestedAt: '2026-11-01T20:00:16.991Z'
---

## Overview

Acceptance of extraneous untrusted data with trusted data vulnerability in OpenText Advanced Authentication Server allows Accessing Functionality Not Properly Constrained by ACLs.

This issue affects Advanced Authentication Server: from 6.4.0.0 through 6.4.3.8, from 6.5.0.0 through 6.5.0.10, and from 6.6.0.0 through 6.6.1.0.

## Affected

- `advanced_authentication_server >= 6.4.0.0 <= 6.4.3.8`
- `advanced_authentication_server >= 6.5.0.0 <= 6.5.0.10`
- `advanced_authentication_server >= 6.6.0.0 <= 6.6.1.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.