CVE-2026-110761 ILIAS-eLearning e.V. CVE debrief

Who should care

Defenders and administrators of ILIAS installations, especially those with Test creation or import permissions granted to users, should assess exposure and prioritize remediation. They should verify ILIAS version and check if it's within the affected range (before 9.24, 10.12, or 11.5). They should also restrict Test creation and import permissions to trusted users and monitor for suspicious Test archive imports and analyze logs for potential exploitation

Why it matters

This vulnerability allows authenticated users to inject malicious objects, potentially leading to code execution, and requires defenders to verify exposure, restrict permissions, and apply patches.

• Potential code execution through deserialization of arbitrary objects.
• Possible unauthorized access or modification of Test data.
• Required verification of ILIAS version and user permissions.
• Necessity for timely application of patches or updates.

Technical summary

The vulnerability allows authenticated users with Test creation or import permission to deserialize arbitrary objects via crafted Test archives, potentially leading to code execution. The deserialization of arbitrary objects can be exploited by attackers to inject malicious objects and execute code. Defenders should prioritize verifying exposure and assessing the impact of potential exploitation, especially in environments where Test creation or import permissions are granted to users. The vulnerability is caused by the lack of proper validation of user-input data, which allows attackers to inject malicious objects.

Defensive priority

Defenders should prioritize verifying exposure and assessing the impact of potential exploitation, especially in environments where Test creation or import permissions are granted to users.

Recommended defensive actions

• Verify ILIAS version and check if it's within the affected range (before 9.24, 10.12, or 11.5).
• Restrict Test creation and import permissions to trusted users.
• Monitor for suspicious Test archive imports and analyze logs for potential exploitation attempts.
• Apply patches or updates provided by the vendor (ILIAS-eLearning e.V.) as soon as possible.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and source item provide details on the vulnerability, including affected versions and potential exploitation vectors. The vulnerability allows authenticated users with Test creation or import permission to deserialize arbitrary objects via crafted Test archives, potentially leading to code execution. Defenders should verify exposure and assess the impact of potential exploitation, especially in environments where Test creation or import permissions are granted to users. The source item and CVE record provide evidence of

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.