CVE-2026-85538— MISP 属性删除权限绕过漏洞
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。
以下是这段漏洞描述信息的中文翻译，采用了专业的安全公告/技术文档语体： 漏洞描述 MISP 中存在一个授权不当漏洞，允许已认证用户删除事件中的属性，即使他们缺乏所需的 或 权限。 受影响的属性删除路径依赖于 中执行的组织机构成员资格检查，但未一致地执行 MISP 的事件修改授权规则。因此，即使所属角色未被授权修改该事件，属于与某事件关联组织的用户仍有可能删除单个属性或执行批量属性删除操作。 这导致属性编辑与删除之间出现不一致：属性编辑正确使用了 MISP 的 授权逻辑，而受影响的删除操作则可以绕过这些权限检查。 拥
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一、 漏洞 CVE-2026-85538 基础信息
漏洞信息
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Vulnerability Title
MISP Attribute Deletion Authorization Bypass Allows Users Without Modify Permissions to Delete Attributes
来源: CVE Program / CVE List V5
Vulnerability Description
An incorrect authorization vulnerability in MISP allowed authenticated users to delete attributes from events despite lacking the required perm_modify or perm_modify_org permissions.
The affected attribute deletion paths relied on organization membership checks performed by MispAttribute::deleteAttribute() but did not consistently enforce MISP's event modification authorization rules. Consequently, a user belonging to the organization associated with an event could potentially delete individual attributes or perform bulk attribute deletion even when their assigned role was not authorized to modify the event.
This created an inconsistency between attribute editing and deletion: editing an attribute correctly used MISP's ACL::canModifyEvent() authorization logic, whereas the affected deletion operations could bypass these permission checks.
An authenticated attacker with access to an affected MISP instance and membership in the organization owning an event could exploit this flaw to remove attributes from that event, potentially causing unauthorized modification or loss of threat intelligence data.
The patch introduces a common authorization check for all affected deletion paths. Before deletion, MISP now resolves the associated events and verifies that the current user is authorized to modify each event using the same authorization mechanism used by normal event and attribute modification operations.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-85538 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
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CVE-2026-85538 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-2026-85533 | 7.6 HIGH | MISP 共享组授权绕过漏洞 |
| CVE-2026-85547 | 6.2 MEDIUM | MISP 跨站请求伪造漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-85538
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