Drupal Core Open Redirect vulnerable 0.0.0-10.5.12/10.6.0-11.3.12
CVE-2026-55806 Published on July 10, 2026
Drupal core - Less critical - Cache poisoning and open redirect - SA-CORE-2026-007
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.*.
Vulnerability Analysis
CVE-2026-55806 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is an Open Redirect Vulnerability?
A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. An http parameter may contain a URL value and could cause the web application to redirect the request to the specified URL. By modifying the URL value to a malicious site, an attacker may successfully launch a phishing scam and steal user credentials. Because the server name in the modified link is identical to the original site, phishing attempts have a more trustworthy appearance.
CVE-2026-55806 has been classified to as an Open Redirect vulnerability or weakness.
Products Associated with CVE-2026-55806
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Affected Versions
Drupal core:- Version 0.0.0 and below 10.5.12 is affected.
- Version 10.6.0 and below 10.6.11 is affected.
- Version 11.2.0 and below 11.2.14 is affected.
- Version 11.3.0 and below 11.3.12 is affected.
- Version 0.0.0 and below 11.0.* is affected.
- Version 0.0.0 and below 11.1.* is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.