CVE-2026-110761
Published:October 14, 2026
Updated:October 15, 2026
ILIAS before 9.24, 10.12, and 11.5 contains a PHP object injection vulnerability that allows authenticated users with Test creation or import permission to deserialize arbitrary objects via crafted Test archives. Attackers can inject a malicious tst_sequence sequence attribute that is passed to unserialize(), abusing Guzzle or Monolog gadget chains to write PHP files and execute code.
Affected Packages
https://github.com/ILIAS-eLearning/ILIAS.git (GITHUB):
Affected version(s) >=v11.0 <v11.5Fix Suggestion:
Update to version v11.5https://github.com/ILIAS-eLearning/ILIAS.git (GITHUB):
Affected version(s) >=v9.0 <v9.24Fix Suggestion:
Update to version v9.24https://github.com/ILIAS-eLearning/ILIAS.git (GITHUB):
Affected version(s) >=v10.0 <v10.12Fix Suggestion:
Update to version v10.12Related Resources (10)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Deserialization of Untrusted Data