Answer in brief
CVE-2026-80428 records a Critical severity (CVSS 9.8) vulnerability in ILIAS PHP Object Injection via Shibboleth Logout. The current sources do not mark it as known exploited. The current feed maps ILIAS-eLearning e.V./ILIAS (generic), ILIAS-eLearning e.V./ILIAS (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps ILIAS-eLearning e.V./ILIAS (generic), ILIAS-eLearning e.V./ILIAS (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| ILIAS-eLearning e.V./ILIASgeneric | >=0 <9.22 || >=10.0 <10.10 || >=11.0 <11.3 | 9.22, 10.10, 11.3 |
| ILIAS-eLearning e.V./ILIASgeneric | >=9.0 <9.22 || >=10.0 <10.10 || >=11.0 <11.3 | 9.22, 10.10, 11.3 |
Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 26, 2026
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.
Quoted source text, attributed separately from HOL analysis.