Auth bypass in Drupal Pankm

CVE-2026-16646

Vulnerability in Drupal PanKM. This issue affects PanKM versions: *.*.

Vulnerability class: Broken Authentication

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.002 (5.4th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-16646: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-16646?
CVE-2026-16646 is a medium-severity vulnerability in Drupal Pankm, classified under Missing Authentication for Critical Function. CVSS score: 5.7/10. Published 2026-08-25.
How severe is CVE-2026-16646?
Medium severity. CVSS v3 base score is 5.7 out of 10.