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CVE-2026-112256— Logon bypass (trust of attacker-controlled completed-methods list)

Quick assessment

Affected
OpenText Advanced Authentication Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenText Advanced Authentication Server 存在“将不可信的额外数据与可信数据混合接受”的漏洞，该漏洞可能导致攻击者访问未通过访问控制列表（ACL）进行适当限制的功能。 受影响的版本包括：Advanced Authentication Server 6.4.0.0 至 6.4.3.8、6.5.0.0 至 6.5.0.10，以及 6.6.0.0 至 6.6.1.0。

CVSS 9.2 · Critical EPSS 0.24% · P16

Affected Version Matrix 3

VendorProduct Version RangeStatus
OpenText Advanced Authentication Server 6.4.0.0≤ 6.4.3.8 affected
6.5.0.0≤ 6.5.0.10 affected
6.6.0.0≤ 6.6.1.0 affected
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I. Basic Information for CVE-2026-112256

Vulnerability Information
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Vulnerability Title
Logon bypass (trust of attacker-controlled completed-methods list)
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
在可信数据中接受外来的不可信数据
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenText Advanced Authentication Server 6.4.0.0 ~ 6.4.3.8 -

II. Public POCs for CVE-2026-112256

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III. Intelligence Information for CVE-2026-112256

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Vendor Pages for CVE-2026-112256 (4)

IV. Related Vulnerabilities

Same product: Advanced Authentication Server
Same vendor: OpenText
Same weakness: CWE-349