Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-80428

CVE-2026-80428CRITICAL

ILIAS-eLearning e.V. ILIAS — ILIAS PHP Object Injection via Shibboleth Logout

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   N   H   H   H    9.3   .0467   91.5     —

AFFECTED
  Product  Versions  Fixed
  ILIAS    9.0 –     —

TIMELINE
  Aug 26  Reserved by VulnCheck
  Aug 26  Published (CNA: VulnCheck)
  Sep 30  EXPLOIT PUBLISHED — CVE-2026-80428 (ILIAS-eLearning e.V. ILIAS). Public exploit reference added.

CWE-502 · CNA: VulnCheck · CVSS v4.0 · 11 references · NVD status: Awaiting Analysis

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 26, 2026	Reserved	Reserved by VulnCheck
August 26, 2026	Published	Published (CNA: VulnCheck)
September 30, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-80428 (ILIAS-eLearning e.V. ILIAS). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
ILIAS-eLearning e.V.	ILIAS	—	9.0	—

Weaknesses

CWE-502

References (11)

Authoritative record: CVE-2026-80428 at cve.org

Vendors: ilias-elearning e.v

Weaknesses: CWE-502

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-80428 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.