CVE-2026-110761: Deserialization of Untrusted Data in ILIAS-eLearning e.V. ILIAS
Description
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.
CVSS v4.0
Score 8.7high
Affected software
ILIAS-eLearning e.V.
ILIAS
pkg:github/ILIASRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-110761 is a PHP object injection vulnerability in ILIAS eLearning software versions prior to 9.24, 10.12, and 11.5. Authenticated users with permissions to create or import Tests can craft malicious Test archives containing a tst_sequence attribute that is deserialized unsafely. This vulnerability abuses gadget chains in third-party libraries such as Guzzle or Monolog to write PHP files and achieve remote code execution.
Potential Impact
Successful exploitation allows an authenticated user with specific permissions to execute arbitrary PHP code on the server, potentially leading to full system compromise. The vulnerability requires authentication and specific privileges, but the impact is high due to the ability to write and execute arbitrary PHP files.
Mitigation Recommendations
No explicit patch or remediation details are provided in the input data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until patched, restrict Test creation and import permissions to trusted users only and monitor for suspicious activity related to Test archives.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-14T17:27:30.335Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6acfd22f2cdf04f656a33dad
Added to database: 10/14/2026, 19:04:15 UTC
Last enriched: 10/14/2026, 19:18:28 UTC
Last updated: 10/14/2026, 22:56:22 UTC
Views: 8
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