CVE-2026-55806: URL Redirection to Untrusted Site ('Open Redirect') vulnerability in Drupal Drupal core allows Content Spoofin

Routine

MEDIUM 5.9REMOTEUPGRADE

CVE-2026-55806 is a medium-severity flaw (CVSS 5.9) affecting drupal. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

URL Redirection to Untrusted Site ('Open Redirect') vulnerability in Drupal Drupal core allows Content Spoofing. This issue affects Drupal core versions: from 0.0.0 to 10.5.12, from 10.6.0 to 10.6.11, from 11.2.0 to 11.2.14, from 11.3.0 to 11.3.12, from 0.0.0 to 11.0.*, from 0.0.0 to 11.1.*.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-601
Published	2026-07-10
Last modified	2026-10-25

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

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-10 22:16 UTCPublished CVE record published
2026-10-25 15:10 UTCUpdated Record last modified

drupal drupal UPGRADE

Affected: < 10.5.12 · >= 10.6.0 and < 10.6.11 · >= 11.0.0 and < 11.2.14 · >= 11.3.0 and < 11.3.12

Fixed in: 10.5.12, 10.6.11, 11.2.14, 11.3.12

Safe to downgrade to: a release before 10.6.0

1. Check installed version

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

2. UPGRADE to 10.5.12 (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 10.6.0 (Debian / Ubuntu)

apt-cache madison drupal sudo apt install drupal=<VERSION_BEFORE_10.6.0> 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_10.6.0> 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 - Less critical - Cache poisoning and open redirect - SA-CORE-2026-007 2026-06-17

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-2026-55806?

drupal: upgrade to 10.5.12, 10.6.11, 11.2.14, 11.3.12. Exact commands for each OS are on this page.

Is CVE-2026-55806 being exploited?

CVE-2026-55806 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-2026-55806 affect?

CVE-2026-55806 affects drupal. Severity is medium (CVSS 5.9). URL Redirection to Untrusted Site ('Open Redirect') vulnerability in Drupal Drupal core allows Content Spoofing. This issue affects Drupal core versions: from 0.0.0 to 10.5.12, from 10.6.0 to 10.6.11, from 11.2.0 to 11.2.14, from 11.3.0 to

How urgent is CVE-2026-55806?

Priority 32/100. Remotely exploitable, no login, no user action

Software pages

Drupal vulnerabilities

Related CVEs

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References

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