What is CVE-2026-55806?

CVE-2026-55806 is a medium-severity vulnerability in Drupal, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.9/10. Published 2026-07-10.

How severe is CVE-2026-55806?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Open Redirect in Drupal

CVE-2026-55806

URL Redirection to Untrusted Site ('Open Redirect') vulnerability in Drupal Drupal core allows Content Spoofing. This issue affects Drupal core versions: from 0.0.0 to 10.5.12, from 10.6.0 to 10.6.11, from 11.2.0 to 11.2.14, from 11.3.0 to 11.3.12, from 0.0.0 to 11.0.*, from 0.0.0 to 11.1.*.

Vulnerability class: Open Redirect

EPSS: 0.003 (26.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Drupal
Drupal Core — versions 0.0.0, 10.6.0, 11.2.0

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

mlhess@drupal.org (Vendor Advisory)

Frequently asked questions

What is CVE-2026-55806?: CVE-2026-55806 is a medium-severity vulnerability in Drupal, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.9/10. Published 2026-07-10.
How severe is CVE-2026-55806?: Medium severity. CVSS v3 base score is 5.9 out of 10.