CVE-2026-8639: IBM Security Verify Directory session fixation in Web Application

CVE-2026-8639 · Severity: high · CVSS 8.8 · Published 2026-11-08

IBM Security Verify Directory is a directory management and authentication service used by enterprises to control access to corporate systems. An attacker with valid credentials can exploit a session fixation vulnerability to hijack authenticated user sessions, gaining full unauthorized access to the directory management console. This could allow an attacker to modify user accounts, permissions, and directory data affecting all systems relying on the directory service.

Technologies: IBM Security Verify Directory, IBM Verify Directory. Vendors: IBM.

Quick answers

Is CVE-2026-8639 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-8639 being exploited in the wild.
How severe is CVE-2026-8639?
High severity, with a CVSS score of 8.8, published 8 November 2026.
Which products and versions are affected?
IBM Security Verify Directory 10.0.0 through 10.0.4; IBM Verify Directory 11.0.0.
Is there a fix for CVE-2026-8639?
Yes: fixed in IBM Security Verify Directory v10.0.4.4, IBM Verify Directory v11.0.1.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-8639 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-8639?
Check whether you run IBM Security Verify Directory or IBM Verify Directory at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: IBM Security Verify Directory v10.0.4.4, IBM Verify Directory v11.0.1.2

Technical details

The Web Application is vulnerable to session fixation (CWE-384) where an attacker can establish a session and, after a victim authenticates, hijack the authenticated session to gain unauthorized access to the directory management console. This requires the attacker to have valid credentials (PR:L) but no user interaction is required. An attacker gains the ability to impersonate authenticated users with full administrative access to the directory.

Affected products

  • IBM Security Verify Directory 10.0.0 through 10.0.4
  • IBM Verify Directory 11.0.0

Timeline

  • 2026-10-23: advisory
  • 2026-11-08: disclosed

References

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