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Critical · 9.8 Public exploit CVE-2026-80428 EUVD-2026-66602GHSA-6h76-35rh-gxm9

ILIAS PHP Object Injection via Shibboleth Logout

Published Aug 26, 2026 · Updated Sep 30, 2026 · Assigned by VulnCheck

Vendor: ILIAS-eLearning e.V. Product: ILIAS

Description

ILIAS before versions 9.22, 10.10, and 11.3 contains an unauthenticated PHP object injection vulnerability that allows unauthenticated attackers to execute arbitrary code by injecting serialized objects through the LTI authentication endpoint and triggering deserialization via the Shibboleth back-channel logout endpoint. Attackers can write arbitrary serialized objects into session storage, then exploit an available POP gadget through the logout endpoint's unrestricted deserialization to write attacker-controlled PHP content to a web-accessible path and achieve remote code execution as the web server user.

Affected products

VendorProductAffectedFixed
ILIAS-eLearning e.V. ILIAS 9.0 – < 9.22, 10.0 – < 10.10, 11.0 – < 11.3 9.22

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 3 repositories

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 1

References