CVE-2026-112256 PUBLISHED

Logon bypass (trust of attacker-controlled completed-methods list)

Assigner: OpenText
Reserved: 19.10.2026 Published: 29.10.2026 Updated: 29.10.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 9.2

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	OpenText
Product	Advanced Authentication Server
Versions	Default: unaffected affected from 6.4.0.0 to 6.4.3.8 (incl.) affected from 6.5.0.0 to 6.5.0.10 (incl.) affected from 6.6.0.0 to 6.6.1.0 (incl.)

Credits

JAN FISHER finder

References

Problem Types

CWE-349 Acceptance of extraneous untrusted data with trusted data CWE

Impacts

CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs