Code execution via object-injection gadget chain
Published May 19, 2026 · Updated May 19, 2026
Object injection in affected Drupal core releases allows attackers to achieve code execution or SQL injection through a gadget chain. Drupal discloses only that a chain of core methods becomes serialization gadgets; it does not identify the methods or the object-state operations they perform. The chain is not directly exploitable: a separate flaw must pass attacker-controlled data to PHP unserialize(), and no such Drupal core path is known.
Summary
What happened
Object injection in affected Drupal core releases allows attackers to achieve code execution or SQL injection through a gadget chain. Drupal discloses only that a chain of core methods becomes serialization gadgets; it does not identify the methods or the object-state operations they perform. The chain is not directly exploitable: a separate flaw must pass attacker-controlled data to PHP unserialize(), and no such Drupal core path is known.
The record
- CVE
- CVE-2026-6366
- Published
- May 19, 2026
- Updated
- May 19, 2026
- Vendor
- Avatar Uploader Project
- Product
- Drupal core
- Classifications
- CWE-915
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- May 19, 2026CVE publishedPublication date reported by the CVE source.
- May 19, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.6.0 <10.6.7
- Affected versionversion=11.0.0 <11.2.11
- Affected versionversion=11.3.0 <11.3.7
- Affected versionversion=8.0.0 <10.5.9
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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