Medium severity · published Jul 10, 2026
CVE-2026-55803
Drupal core - Critical - PHP object injection - SA-CORE-2026-005
5.9
CVSS
0.4%
EPSS
No
On KEV
Description
Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Drupal Drupal core allows Object Injection. 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.*.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DR
Drupal · Drupal
0.0.0 before 10.5.12; 10.6.0 before 10.6.11; 11.2.0 before 11.2.14; 11.3.0 before 11.3.12; 0.0.0 before 11.0.*; 0.0.0 before 11.1.* · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-55803
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-55803
Vendor Advisory
https://www.drupal.org/sa-core-2026-005
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