CVE-2026-85533— MISP 共享组授权绕过漏洞
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 中存在一个授权缺陷，允许已认证用户在未验证其是否有权使用所引用的共享组（Sharing Group）的情况下提交 。 在多个属性和 Galaxy Cluster 的创建与编辑流程中，对所提交的共享组进行的验证仅在请求显式将 字段设置为 4（即“共享组”）时才会执行。因此，攻击者可以构造一个包含 但省略 参数（或使其不等于 4）的请求，从而跳过针对该共享组的授权检查。 这可能导致拥有创建或修改相关 MISP 对象权限的用户，将数据关联到一个他们无权使用的共享组中。根据受影响对象现有的分发设置及后续处理逻辑，
可能的 ATT&CK 技术 1 AI
T1633
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一、 漏洞 CVE-2026-85533 基础信息
漏洞信息
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Vulnerability Title
MISP Sharing Group Authorization Bypass via Omitted Distribution Parameter
来源: CVE Program / CVE List V5
Vulnerability Description
An authorization flaw in MISP allowed an authenticated user to submit a sharing_group_id without verifying that the user was authorized to use the referenced Sharing Group.
In several attribute and Galaxy Cluster creation and editing workflows, validation of the submitted Sharing Group was performed only when the request explicitly set the distribution field to 4 ("Sharing Group"). An attacker could therefore craft a request containing a sharing_group_id while omitting the distribution parameter, or otherwise avoiding the distribution == 4 condition, causing the Sharing Group authorization check to be skipped.
This could allow a user with permission to create or modify the affected MISP objects to associate data with a Sharing Group that they are not authorized to use. Depending on the affected object's existing distribution settings and subsequent processing, this could bypass intended information-sharing boundaries and result in unauthorized placement or distribution of data to members of another Sharing Group.
The issue affected attribute attachment and editing operations as well as Galaxy Cluster creation and editing. The fix ensures that authorization is performed whenever a non-empty sharing_group_id is submitted, independently of the distribution parameter. It also centralizes the authorization decision in SharingGroup::canUse() and explicitly rejects empty Sharing Group identifiers rather than allowing them to be interpreted as an unrestricted query.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/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
二、漏洞 CVE-2026-85533 的公开POC
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CVE-2026-85533 补丁与修复 (1)
同批安全公告 · misp · 2026-09-04 · 共 4 条
| CVE-2026-85546 | 8.6 HIGH | MISP共享组快速编辑CSRF漏洞 |
| CVE-2026-85538 | 8.3 HIGH | MISP 属性删除权限绕过漏洞 |
| CVE-2026-85547 | 6.2 MEDIUM | MISP 跨站请求伪造漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-85533
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