Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The Navigation module in Drupal core (drupal/core on Packagist) is affected in versions from 10.3.0 before 10.6.19, from 11.0.0 before 11.3.19, from 11.4.0 before 11.4.10, and from 12.0.0-alpha1 before 12.0.0-beta2. An attacker would need an account with a role that can enter HTML tags with specific data attributes, or with the administer menu permission, and could then use the insufficient sanitization to run cross-site scripting. The fix is to upgrade drupal/core to 10.6.19, 11.3.19, 11.4.10, or 12.0.0-beta2, depending on the release line in use.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.5 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L | ADP (CISA-ADP) |
- CISA KEV Not listed.
- EPSS 0.0021, the 11th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 30 Oct 2026, 03:09 UTC Confirmed by the CVE List
- 30 Oct 2026, 04:18 UTC Confirmed by NVD
- 31 Oct 2026, 13:53 UTC First seen by agentprime
- 31 Oct 2026, 13:53 UTC Confirmed by OSV