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CVE-2026-85546— MISP Sharing Group Quick-Edit Actions Allow CSRF via State-Changing GET Requests

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组织开源的一个威胁情报共享与分析平台。 MISP 2.4.54及之前版本存在跨站请求伪造漏洞，该漏洞源于共享组快速编辑功能存在跨站请求伪造漏洞，HTTP方法验证被注释，导致状态更改操作可通过GET请求调用，可能导致经过身份验证且具有足够权限的用户被诱导请求恶意链接，从而修改共享组成员关系，添加或删除组织或服务器，可能导致未授权访问信息或破坏信息共享。

CVSS 8.6 · High EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
misp misp ≤ 2.4.45 affected
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I. Basic Information for CVE-2026-85546

Vulnerability Information
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Vulnerability Title
MISP Sharing Group Quick-Edit Actions Allow CSRF via State-Changing GET Requests
Source: CVE Program / CVE List V5
Vulnerability Description
MISP contains a cross-site request forgery (CSRF) vulnerability in the sharing group quick-edit functionality. The addOrg, removeOrg, addServer, and removeServer actions share the __initialiseSGQuickEdit() helper, where the HTTP method validation intended to restrict these operations to POST requests was commented out. As a result, these state-changing actions could be invoked using GET requests. An attacker could craft a URL targeting one of the affected actions and cause an authenticated MISP user with sufficient privileges to request it, for example through a malicious link or embedded web resource. Successful exploitation could modify the membership of a MISP sharing group without the victim intentionally performing the operation. Depending on the action performed, an attacker could add or remove organisations or servers from a sharing group, potentially granting unintended access to information distributed through that sharing group or disrupting legitimate information sharing. The patch restores HTTP method enforcement centrally in __initialiseSGQuickEdit() by calling allowMethod(['post']), ensuring that all four affected quick-edit operations require POST requests and are therefore subject to the application's normal protections for state-changing requests.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
MISP 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MISP是MISP组织开源的一个威胁情报共享与分析平台。 MISP 2.4.54及之前版本存在跨站请求伪造漏洞，该漏洞源于共享组快速编辑功能存在跨站请求伪造漏洞，HTTP方法验证被注释，导致状态更改操作可通过GET请求调用，可能导致经过身份验证且具有足够权限的用户被诱导请求恶意链接，从而修改共享组成员关系，添加或删除组织或服务器，可能导致未授权访问信息或破坏信息共享。
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 ~ 2.4.45 -

II. Public POCs for CVE-2026-85546

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III. Intelligence Information for CVE-2026-85546

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Patches & Fixes for CVE-2026-85546 (1)

Same Patch Batch · misp · 2026-09-04 · 4 CVEs total

CVE-2026-85538 8.3 HIGH MISP Attribute Deletion Authorization Bypass Allows Users Without Modify Permissions to De
CVE-2026-85533 7.6 HIGH MISP Sharing Group Authorization Bypass via Omitted Distribution Parameter
CVE-2026-85547 6.2 MEDIUM Cross-Site Request Forgery via Attacker-Controlled REST Detection in MISP

IV. Related Vulnerabilities

Same product: misp
Same vendor: misp
Same weakness: CWE-352

V. Comments for CVE-2026-85546

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