CVE-2026-85538— MISP 授权问题漏洞
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是MISP组织开源的一个威胁情报共享与分析平台。 MISP 2.5.45及之前版本存在授权问题漏洞，该漏洞源于属性删除操作的授权检查不一致，允许已认证用户绕过事件修改权限删除属性，可能导致未授权修改或威胁情报数据丢失。
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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
Vulnerability Title
MISP 授权问题漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
MISP是MISP组织开源的一个威胁情报共享与分析平台。 MISP 2.5.45及之前版本存在授权问题漏洞，该漏洞源于属性删除操作的授权检查不一致，允许已认证用户绕过事件修改权限删除属性，可能导致未授权修改或威胁情报数据丢失。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-85538 的公开POC
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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 跨站请求伪造漏洞 |
| CVE-2026-85533 | 7.6 HIGH | MISP 授权问题漏洞 |
| 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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