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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 在共享组的快速编辑功能中存在跨站请求伪造（CSRF）漏洞。 、 、 和 这四个操作都共享 辅助函数，而原本用于限制这些操作仅允许通过 POST 请求发起的 HTTP 方法验证代码被注释掉了。 因此，这些会改变状态的操作可以通过 GET 请求触发。攻击者可以构造一个指向受影响的某个操作的 URL，并诱导具有相应权限的已认证 MISP 用户访问该 URL，例如通过恶意链接或嵌入的 Web 资源。 成功利用该漏洞后，可以在受害者未主动执行操作的情况下，修改 MISP 共享组的成员配置。根据具体执行的操作不同，攻

CVSS 8.6 · High EPSS 0.20% · P10

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
misp misp ≤ 2.4.54 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

Affected Products

Vendor Product Affected Versions CPE Subscribe
misp misp 0 ~ 2.4.54 -

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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