PatchTheCVECVE-2026-80428: ILIAS before versions 9.22, 10.10, and 11.3 contains an unauthenticated PHP object injection vulnerability tha
CVE-2026-80428 is a critical-severity flaw (CVSS 9.8) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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
Why this priority
- Critical severity
- EPSS top 8%: very likely to be exploited
- Public exploit reference
- CISA SSVC: automatable with total technical impact
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 4.7% (top 8%) |
| CISA exploited list | No |
| Weakness | CWE-502 |
| Published | 2026-08-26 |
| Last modified | 2026-09-30 |
Last updated 2026-09-30 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- GitHub PoC: HackfutSecRoot/CVE-2026-80428 (2 stars)
- GitHub PoC: digiprosec/CVE-2026-80428 (0 stars)
- GitHub PoC: shivammittal2403/cve-2026-80428-ctf (0 stars)
- Write-up: schweigertit.de/en/advisories/SIT-2026-002.html
- Write-up: schweigertit.de/en/writeups/php-object-injection-shibboleth-logout.html
- Exploit-DB: CVE-2026-80428 Unauthenticated PHP Object Injection via Shibboleth - ILIAS < 9.22_ 10.0 < 10.10_ 11.0 < 11.3 - RCE
Advisories and coverage
Research and news
- Exploit-DB Latest: [remote] CVE-2026-80428 Unauthenticated PHP Object Injection via Shibboleth - ILIAS < 9.22, 10.0 < 10.10, 11.0 < 11.3 - RCE 2026-09-11
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-80428?
No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.
Is CVE-2026-80428 being exploited?
CVE-2026-80428 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-80428 affect?
CVE-2026-80428 affects affected software. Severity is critical (CVSS 9.8). 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 endpoi
How urgent is CVE-2026-80428?
Priority 70/100. Critical severity; EPSS top 8%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action