Quick answers
- Is CVE-2026-80428 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-80428 being exploited in the wild.
- How severe is CVE-2026-80428?
- Critical severity, with a CVSS score of 9.8, published 26 August 2026.
- Which products and versions are affected?
- ILIAS ILIAS before 9.22, 10.10, and 11.3.
- Is there a fix for CVE-2026-80428?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-80428 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-80428?
- Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a PHP object injection flaw in ILIAS's LTI authentication endpoint combined with unsafe deserialization in the Shibboleth back-channel logout handler. An unauthenticated attacker can write serialized gadget objects into session storage via the LTI endpoint, then trigger deserialization through the logout endpoint without authentication checks. By chaining available PHP object gadgets, the attacker achieves arbitrary file write on the web-accessible filesystem, leading to remote code execution as the web server user. No authentication is required; only network access to the vulnerable endpoints is needed.
Affected products
- ILIAS ILIAS before 9.22, 10.10, and 11.3
Timeline
- 2026-08-26: disclosed