CSRF in IBM Security Verify Directory

CVE-2026-8640

IBM Security Verify Directory 10.0.0 through 10.0.4 and IBM Verify Directory 11.0.0 does not set the SameSite attribute on session cookies, making it vulnerable to Cross-Site Request Forgery (CSRF) attacks. An attacker can cause authenticated users' browsers to send unauthorized requests to the application.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-8640?
CVE-2026-8640 is a low-severity vulnerability in IBM Security Verify Directory, classified under Cross-Site Request Forgery (CSRF). CVSS score: 3.5/10. Published 2026-11-08.
How severe is CVE-2026-8640?
Low severity. CVSS v3 base score is 3.5 out of 10.