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CVE-2026-61474— MISP: Improper sharing group authorization check when adding attributes

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是MISP组织开源的一套开源的软件解决方案。该产品用于收集、存储、分发、共享网络安全指标,并具有威胁网络安全事件分析和恶意软件分析等功能。 MISP 2.5.42及之前版本存在授权问题漏洞，该漏洞源于属性创建端点中的授权检查不当，允许具有添加属性权限的已认证用户提交sharing_group_id而不触发相应的共享组授权检查，可能导致访问控制绕过影响属性共享元数据的完整性，并可能暴露或滥用受限制的共享组关系。

AI Predicted 7.5 Difficulty: Easy EPSS 0.41% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
misp misp ≤ 2.5.42 affected
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I. Basic Information for CVE-2026-61474

Vulnerability Information
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Vulnerability Title
MISP: Improper sharing group authorization check when adding attributes
Source: CVE Program / CVE List V5
Vulnerability Description
An improper authorization check in MISP’s attribute creation endpoint allowed an authenticated user with permission to add attributes to submit a sharing_group_id without triggering the corresponding sharing group authorization check, as long as the attribute distribution value was not explicitly set to 4 — “sharing group”. As a result, a user could reference or associate an attribute with a sharing group they were not authorized to use. This could lead to an access-control bypass affecting the integrity of attribute sharing metadata and potentially expose or misuse restricted sharing group relationships. The patch changes the authorization logic so that the sharing group permission check is performed whenever a non-empty sharing_group_id is provided, regardless of the selected distribution value.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
MISP 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MISP是MISP组织开源的一套开源的软件解决方案。该产品用于收集、存储、分发、共享网络安全指标,并具有威胁网络安全事件分析和恶意软件分析等功能。 MISP 2.5.42及之前版本存在授权问题漏洞，该漏洞源于属性创建端点中的授权检查不当，允许具有添加属性权限的已认证用户提交sharing_group_id而不触发相应的共享组授权检查，可能导致访问控制绕过影响属性共享元数据的完整性，并可能暴露或滥用受限制的共享组关系。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
misp misp 0 ~ 2.5.42 -

II. Public POCs for CVE-2026-61474

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III. Intelligence Information for CVE-2026-61474

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Patches & Fixes for CVE-2026-61474 (1)

IV. Related Vulnerabilities

Same product: misp
Same vendor: misp
Same weakness: CWE-863