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CVE-2026-80428— ILIAS before 9.22, 10.10 and 11.3 Unauthenticated PHP Object Injection via Shibboleth Logout Endpoint

Quick assessment

Affected
ILIAS-eLearning e.V. ILIAS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ILIAS 会对未认证调用者的已存储会话数据进行反序列化。位于 的 Shibboleth 后台通道端点运行在一个被 豁免认证的上下文中，其登出通知处理器通过读取会话表中的每一行活动记录，并将每行的存储数据传入手写的解析器，该解析器调用 时未限制允许构造的类。因此，任何会话行中存在的已序列化对象都会在一个匿名请求的上下文中被实例化，并且当这些对象被丢弃时，其析构函数会执行。未登录即可将已序列化对象写入某一行会话中，因为 LTI 认证入口点会将请求参数存入会话，并且该入口点位于同样被初始化代码豁免认证的路径下。应用程序

CVSS 9.8 · Critical

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 3

VendorProduct Version RangeStatus
ILIAS-eLearning e.V. ILIAS < 9.22 affected
10.0< 10.10 affected
11.0< 11.3 affected
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I. Basic Information for CVE-2026-80428

Vulnerability Information
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Vulnerability Title
ILIAS before 9.22, 10.10 and 11.3 Unauthenticated PHP Object Injection via Shibboleth Logout Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
ILIAS deserialises stored session data for an unauthenticated caller. The Shibboleth back-channel endpoint at components/ILIAS/AuthShibboleth/resources/shib_logout.php runs in a context that ilInitialisation exempts from authentication, and its logout-notification handler locates the session to terminate by reading every live row of the session table and passing each row's stored data to a hand-written parser that calls unserialize without restricting which classes may be constructed. Any serialised object present in any session row is therefore instantiated on behalf of an anonymous request, and object destructors run when those objects are discarded. A serialised object can be placed into a session row without logging in, because the LTI authentication entry point stores request parameters into the session and is reachable on a path the same initialisation code exempts from authentication. A class bundled with the application writes a JSON-encoded structure to a file named by one of its own properties when it is destroyed, which places attacker-controlled content at an attacker-chosen path below the web root and results in code execution as the web server user. Versions 9.22, 10.10 and 11.3 remove the endpoint's logout-notification implementation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
ILIAS-eLearning e.V. ILIAS 0 ~ 9.22 -

II. Public POCs for CVE-2026-80428

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III. Intelligence Information for CVE-2026-80428

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Patches & Fixes for CVE-2026-80428 (1)

Vendor Advisories for CVE-2026-80428 (1)

IV. Related Vulnerabilities

Same product: ILIAS
Same weakness: CWE-502

V. Comments for CVE-2026-80428

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