CVE-2026-6365 | Drupal core - Critical - Cross-site scripting - SA-CORE-2026-001

Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Drupal core allows Cross-Site Scripting (XSS). This issue affects Drupal core: from 8.0.0 before 10.5.9, from 10.6.0 before 10.6.7, from 11.0.0 before 11.2.11, from 11.3.0 before 11.3.7.

Published: 2026-05-19 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-6365 is rated Low Risk (29.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.24%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-6365

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.04% 0.24% +0.20%
2 2026-06-12 0.05% 0.04% -0.01%
3 2026-06-05 — 0.05% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-6365

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.1 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 2.7 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2026-6365

GitHub Security Advisory for CVE-2026-6365

GHSA-f3cj-mjqm-fhvj · Severity: medium · Ecosystem: composer — Drupal core is Vulnerable to Cross-Site Scripting

Affected software / configurations for CVE-2026-6365

Vendor Product Version Raw CPE
drupal drupal >= 8.0.0, < 10.5.9 cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
drupal drupal >= 10.6.0, < 10.6.7 cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
drupal drupal >= 11.0.0, < 11.2.11 cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
drupal drupal >= 11.3.0, < 11.3.7 cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*

References for CVE-2026-6365

URL Tags
https://www.drupal.org/sa-core-2026-001 Vendor Advisory
cvelogic Threat Intelligence