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CVE-2026-78401 – Unauthenticated RCE (Deserialization of Untrusted Data) – IBM Security Verify Acces

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Summary

CVE-2026-78401 is a critical deserialization of untrusted data vulnerability (CWE-502) in IBM Security Verify Access and IBM Verify Identity Access. A remote, unauthenticated attacker could execute arbitrary code on an affected system. The CVSS v3.1 base score is 9.8 (Critical).

Technical details

  • Root cause: deserialization of untrusted data (CWE-502).
  • Trigger conditions: no authentication and no user interaction are required.
  • Attack vector: network, low attack complexity.
  • Impact: remote arbitrary code execution, with high impact to confidentiality, integrity and availability.

Affected software

  • IBM Security Verify Access 10.0 through 10.0.9.2
  • IBM Verify Identity Access 11.0 through 11.0.3
  • Container variants of both products in the same version ranges

Severity

CVSS v3.1 base score 9.8 (Critical): CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: upgrade to IBM Verify Identity Access 11.0.3.1 or IBM Security Verify Access 10.0.9.3. For container deployments, apply the updates described in IBM’s documentation.
  • Details are in IBM’s security bulletin (see references).
  • No workarounds were identified in the sources reviewed. Until patched, consider restricting network access to affected systems.

References

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