Critical Drupal Core Vulnerability Requires Immediate Patching

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Critical Drupal Core Vulnerability Requires Immediate Patching

First seen 19 May 2026, 18:19 UTC • •72.0

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ThreatCluster •May 20, 2026 at 18:18 UTC

•A critical vulnerability in Drupal core requires immediate patching by users.
•The vulnerability affects multiple versions, including unsupported branches.
•Drupal recommends updating to the latest supported release before the patch.

Drupal has announced a highly critical vulnerability in its core system, urging users to prepare for a patch release on May 20, 2026. The vulnerability affects multiple versions, including unsupported branches 8.9 and 9.5, and could allow attackers to access non-public data and modify or delete content. The severity score is 20 out of 25, indicating ease of exploitation without privilege requirements. While known exploit methods are not yet available, the potential for rapid development of exploits exists. Users are advised to update to the latest supported release before the patch to mitigate additional risks. The Drupal Security Team emphasizes the urgency of this situation, as exploits could emerge within days of the patch release.

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Timeline

2026-05-16

Drupal announces critical vulnerability

The Drupal Security Team issued a public service announcement about a severe vulnerability requiring urgent attention and patching.

2026-05-20

Patch release scheduled

Drupal will release security updates for affected core branches between 1700 and 2100 UTC.

More articles in this cluster (3)

Threat Graph

5 entities, 4 inferred relationships (STIX 2.1).

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Technique (1)

Data Breach

Weakness (1)

CWE-200 - Exposure of Sensitive Information

Affected Platform (3)

Drupal
Drupal Core
Drupal Steward

Relationships

Data Breach targets Drupal
Data Breach targets Drupal Core
Data Breach targets Drupal Steward
Data Breach related to CWE-200 - Exposure of Sensitive Information

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