Security readout for executives and security teams
Plain-English summary
CVE-2026-6367 is a cross-site scripting issue in Drupal core 11.3.x before 11.3.7. An attacker could potentially cause script execution in a user’s browser if a user interacts with crafted content or a page. Business urgency is moderate: prioritize public Drupal sites and administrator-facing workflows, but there is no cited evidence of active exploitation.
Executive priority
Schedule prompt remediation for affected Drupal 11.3.x sites, especially public portals and administrator-heavy applications. This is not currently a confirmed exploited emergency, but XSS can support account compromise or content tampering when users interact with malicious content.
Technical view
Drupal core is affected from 11.3.0 before 11.3.7 by CWE-79 improper input neutralization during web page generation. CVSS 3.1 is 6.1: network-reachable, low complexity, no privileges required, user interaction required, scope changed, low confidentiality and integrity impact, no availability impact.
Likely exposure
Exposure is limited to Drupal core sites running versions 11.3.0 through versions before 11.3.7. Sites on other versions are not identified as affected in the provided source bundle.
Exploitation context
The CVSS vector indicates exploitation is network-based and requires user interaction. The sources do not report active exploitation, public exploit availability, or specific attack paths. Treat internet-facing Drupal sites as the main validation priority.
Researcher notes
Evidence is limited to the CVE record and Drupal advisory metadata in the provided bundle. No payload details, vulnerable component path, or exploitation-in-the-wild evidence are provided. Avoid assuming impact beyond reflected or stored XSS until Drupal publishes or confirms more detail.
Mitigation direction
- Identify Drupal core version on all managed sites.
- Upgrade affected Drupal 11.3.x installations to 11.3.7 or later.
- Review the Drupal advisory for site-specific update guidance.
- Prioritize public-facing and privileged-user Drupal environments.
Validation and detection
- Confirm whether each site runs Drupal core 11.3.0 through before 11.3.7.
- Check update status against Drupal security advisory SA-CORE-2026-003.
- Verify the deployed version after remediation.
- Review web and application logs for unusual scripted-content activity.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-6367 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://www.drupal.org/sa-core-2026-003CVE reference, drupal
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.