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CVE-2026-6367· NVD / CVE Program· CNA drupal

Drupal core - Moderately critical - Cross-site scripting - SA-CORE-2026-003

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 11.3.0 before 11.3.7.

MediumCVSS 6.1 · v3.1—No exploit Fix available
Published
May 19, 2026
Updated
Jul 24, 2026
EPSS
0.3% · 15th percentile
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Report tools

JSON

Action score

24

Monitor

Low priority for now.

CVSS
24 / 40 · 6.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Affected systems

VendorProduct
drupaldrupal

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • drupal drupal11.3.0 and later · before 11.3.7

Versions reported by the vendor

Affected version ranges reported by the assigning authority (drupal). Independent of NVD's CPE analysis and usually ahead of it.

  • Drupal Drupal core

    • 11.3.0 and later · before 11.3.7affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Packagistdrupal/corefrom 11.3.0 · before 11.3.711.3.7

Same product

drupal: all records

Other highest-scoring records for the same primary product.

  • CVE-2018-7602Drupal core - Highly critical - Remote Code Execution - SA-CORE-2018-004KEV
    99Now
  • CVE-2018-7600Drupal before 7.58, 8.x before 8.3.9, 8.4.x before 8.4.6, and 8.5.x before 8.5.1 allows remote attackers to execute arbitrary code because oKEV
    99Now
  • CVE-2019-6340Drupal core - Highly critical - Remote Code ExecutionKEV
    90Now
  • CVE-2020-13671Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extenKEV
    76This week
  • CVE-2026-9082Drupal core - Highly critical - SQL injection - SA-CORE-2026-004KEV
    74This week
  • CVE-2014-3704The expandArguments function in the database abstraction API in Drupal core 7.x before 7.32 does not properly construct prepared statements,
    60This week

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Drupal Drupal core11.3.7Vendor (CNA)
Packagist:drupal/core11.3.7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-63650 days apartDrupal core - Critical - Cross-site scripting - SA-CORE-2026-001
    24Monitor
  • CVE-2025-3057414 days apartDrupal core - Critical - Cross site scripting - SA-CORE-2025-001
    24Monitor
  • CVE-2024-55635526 days apartDrupal core - Critical - Cross Site Scripting - SA-CORE-2024-005
    24Monitor
  • CVE-2026-5580852 days apartDrupal core - Moderately critical - Improper validation - SA-CORE-2026-009
    21Monitor
  • CVE-2025-31675414 days apartDrupal core - Moderately critical - Cross Site Scripting - SA-CORE-2025-004
    21Monitor
  • CVE-2024-12393526 days apartDrupal core - Moderately critical - Cross Site Scripting - SA-CORE-2024-003
    21Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
none

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

nvd-secondary

Root cause

User content is inserted into the page as HTML. The browser interprets the content as code rather than data.

The bug in code

The whole CWE-79 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
commentEl.innerHTML = comment.body;

Fixed

ts
commentEl.textContent = comment.body;

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

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Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records