Auth bypass in a widely deployed enterprise authentication server (OpenText Advanced Authentication) can enable broad unauthorized access and privilege escalation across organizations.
CVE-2026-112256
Authentication bypass in OpenText Advanced Authentication Server enabling unauthorized function access.
Is CVE-2026-112256 being exploited?
Not confirmed. CVE-2026-112256 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.24% probability of exploitation in the next 30 days.
How severe is CVE-2026-112256?
CVE-2026-112256 is rated Critical with a CVSS score of 9.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-112256?
Yes. A fix has been recorded for CVE-2026-112256. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-112256 affect?
CVE-2026-112256 affects OpenText Advanced Authentication Server 6.4.0.0–6.4.3.8, OpenText Advanced Authentication Server 6.5.0.0–6.5.0.10, OpenText Advanced Authentication Server 6.6.0.0–6.6.1.0. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-112256?
Apply vendor updates immediately; restrict access and monitor authentication logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authentication bypass allows attackers to access protected functions beyond ACLs, enabling privilege escalation, account compromise, and unauthorized actions.
Immediate action required
- affected>= 6.4.0.0 and <= 6.4.3.8
- affected>= 6.5.0.0 and <= 6.5.0.10
- affected>= 6.6.0.0 and <= 6.6.1.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.