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CVE-2026-103659— MISP: Object Distribution ACL Bypass via Event Flattening Exposes Organisation-Only Attributes

一分钟漏洞结论

影响对象
MISP MISP
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

MISP 在事件扁平化（event flattening）功能中存在一个授权绕过漏洞。当用户请求启用 选项的事件时，应用程序会从查询中移除 Object（对象）的包含关系，并将对象的属性作为顶层事件属性返回。在此过程中，原本应用于这些属性的对象级别分发（distribution）和共享组（sharing-group）访问控制检查未被重新应用。 因此，能够查看社区分发（community-distributed）事件的用户，可以获取属于仅限组织内部访问的对象（distribution 级别为 0）或受特定共享组限制的

CVSS 7.1 · High
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一、 漏洞 CVE-2026-103659 基础信息

漏洞信息
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Vulnerability Title
MISP: Object Distribution ACL Bypass via Event Flattening Exposes Organisation-Only Attributes
来源: CVE Program / CVE List V5
Vulnerability Description
MISP contains an authorization bypass in the event flattening feature. When a user requests an event with the flatten option enabled, the application removes the Object containment from the query and returns object attributes as top-level event attributes. In doing so, the object-level distribution and sharing-group access control check was not re-applied to those attributes. As a result, a user who can view a community-distributed event could retrieve attributes belonging to organisation-only objects (distribution level 0) or objects restricted to a specific sharing group, even though the user's organisation does not have access to those objects. This constitutes an unauthorized disclosure of sensitive threat intelligence data. A secondary issue was introduced by the initial remediation: the fix reused the full Object contain conditions (including soft-delete state) as the gate for flattened attributes, causing an event owner requesting deleted attributes to lose all attributes whose parent object was still live. The final fix isolates the distribution ACL condition as the sole gate. Preconditions: - An authenticated user with access to a community-distributed event - The event contains at least one object with a distribution level or sharing group that restricts access beyond the event's own distribution Impact: - Unauthorized disclosure of attributes belonging to restricted objects - Potential exposure of organisation-specific threat intelligence to other organisations Affected versions: <2.5.48
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
MISP MISP 0 ~ 2.5.48 cpe:2.3:a:misp:misp:*:*:*:*:*:*:*:*

二、漏洞 CVE-2026-103659 的公开POC

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三、漏洞 CVE-2026-103659 的情报信息

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CVE-2026-103659 其他参考 (2)

同批安全公告 · MISP · 2026-10-01 · 共 6 条

CVE-2026-103655 9.3 CRITICAL MISP TOTP Code Replay Allows Duplicate Authentication Within Validity Period
CVE-2026-103651 7.6 HIGH MISP HOTP Token Replay via Stale Session-Cached Counter Allows Second-Factor Authenticatio
CVE-2026-103858 5.3 MEDIUM MISP Incomplete Thread Authorization Allows Unauthorized Read and Post Access to Discussio
CVE-2026-103662 5.1 MEDIUM MISP Reflected XSS in Taxonomy Tag Confirmation Forms
CVE-2026-103664 4.8 MEDIUM MISP Reflected Cross-Site Scripting via Unsanitized Analyst Data Seed Parameter

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-103659

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