CVE-2026-6367: Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal D

Routine

MEDIUM 6.1UPGRADE

CVE-2026-6367 is a medium-severity flaw (CVSS 6.1) affecting drupal. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-05-19
Last modified	2026-07-24

Publisher (CNA): Drupal.org · Vendor: drupal

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-19 23:16 UTCPublished CVE record published
2026-07-24 08:10 UTCUpdated Record last modified

drupal drupal UPGRADE

Affected: >= 11.3.0 and < 11.3.7

Fixed in: 11.3.7

Safe to downgrade to: a release before 11.3.0

1. Check installed version

apt-cache policy drupal || rpm -q drupal || drupal --version

2. UPGRADE to 11.3.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade drupal

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade drupal

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 11.3.0 (Debian / Ubuntu)

apt-cache madison drupal sudo apt install drupal=<VERSION_BEFORE_11.3.0> sudo apt-mark hold drupal

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list drupal sudo dnf downgrade drupal-<VERSION_BEFORE_11.3.0> sudo dnf versionlock add drupal

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Advisories and coverage

Official advisories

Drupal Security: Drupal core - Moderately critical - Cross-site scripting - SA-CORE-2026-003 2026-04-15

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-6367?

drupal: upgrade to 11.3.7. Exact commands for each OS are on this page.

Is CVE-2026-6367 being exploited?

CVE-2026-6367 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-6367 affect?

CVE-2026-6367 affects drupal. Severity is medium (CVSS 6.1). 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.

How urgent is CVE-2026-6367?

Priority 24/100. No elevated risk signals yet.

Software pages

Drupal vulnerabilities

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References

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