Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-85226— MISP OnDemand Correlation Engine Missing Access Control Allows Disclosure of Restricted Correlations

Quick assessment

Affected
misp misp
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.

MISP 的按需（OnDemand）关联引擎中存在一个授权缺陷：该引擎在计算关联时，仅依据匹配的属性值进行判断，而未应用与所关联属性和事件相关的分发级别、共享组、组织或其他访问控制限制。因此，经过身份验证的用户可能会收到涉及其无权访问的属性或事件的关联结果。 存在漏洞的关联收集路径未将请求用户纳入考虑。补丁修改了关联收集器，使其能够接收当前用户，并通过 MISP 现有的 授权逻辑过滤返回的属性标识符。该逻辑会根据实时数据，评估事件级、属性级、对象级、分发级以及共享组级的限制。 该问题还影响了依赖先前存储的关联数据的

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1560 · Archive Collected Data

Affected Version Matrix 1

VendorProduct Version RangeStatus
misp misp ≤ 2.5.45 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-85226

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
MISP OnDemand Correlation Engine Missing Access Control Allows Disclosure of Restricted Correlations
Source: CVE Program / CVE List V5
Vulnerability Description
MISP contains an authorization flaw in the OnDemand correlation engine where correlations were calculated solely from matching attribute values without applying the distribution, sharing group, organization, or other access-control restrictions associated with the correlated attributes and events. As a result, an authenticated user could receive correlation results referring to attributes or events that the user was not authorized to access. The vulnerable correlation collection path did not take the requesting user into account. The patch changes the correlation collector to accept the current user and filters the resulting attribute identifiers through MISP's existing fetchAttributesSimple() authorization logic, which evaluates event-, attribute-, object-, distribution-, and sharing-group-level restrictions against the live data. The issue also affected paths relying on previously stored correlation data. Because the OnDemand engine does not maintain the stored correlation table, its denormalized access-control information could be stale. The patch therefore validates correlated attribute identifiers against the current ACLs before returning them and additionally applies normal event visibility conditions when retrieving related events. An authenticated low-privileged user could exploit this issue by querying or creating attributes that correlate with restricted MISP content, potentially learning information about otherwise inaccessible events or attributes.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
misp misp 0 ~ 2.5.45 -

II. Public POCs for CVE-2026-85226

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-85226

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-85226 (1)

Same Patch Batch · misp · 2026-09-03 · 9 CVEs total

CVE-2026-85216 9.5 CRITICAL MISP LDAP and LinOTP Authentication Bypass via Empty or Invalid Credentials
CVE-2026-85236 8.8 HIGH MISP cullEmptyEvents CSRF Allows Irreversible Deletion of Events via GET Request
CVE-2026-85237 8.6 HIGH Missing Rate Limiting in Email OTP Verification Allows Brute-Force Authentication Bypass
CVE-2026-85221 7.6 HIGH MISP CurlClient TLS Peer Verification Disabled by Default Enables Man-in-the-Middle Attack
CVE-2026-85238 7.6 HIGH Session Fixation in MISP CustomAuth Authentication Allows Session Hijacking
CVE-2026-85239 7.1 HIGH MISP Event Template Definition Validation Bypass Allows Persistent Denial of Service
CVE-2026-85227 6.1 MEDIUM Reflected Cross-Site Scripting in MISP Event Filtering via taggedAttributes and galaxyAtta
CVE-2026-85230 5.3 MEDIUM MISP Dashboard Button Widget Allows Persistent JavaScript URL Injection

IV. Related Vulnerabilities

Same product: misp
Same vendor: misp
Same weakness: CWE-862

V. Comments for CVE-2026-85226

No comments yet

Leave a comment