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CVE-2026-54360— MISP sharing group creation mass assignment allows unauthorized takeover of existing sharing groups

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 2.5.40之前版本存在授权问题漏洞，该漏洞源于共享组创建端点存在批量赋值漏洞，控制器在保存提交数据前未移除用户提供的id字段，导致经过身份验证且具有添加共享组权限的用户可提交现有共享组的标识符并修改该共享组，从而可能接管或更改其原本无权访问的共享组，影响共享信息的机密性和完整性。

AI Predicted 8.1 Difficulty: Easy EPSS 0.23% · P14

Possible ATT&CK Techniques 1 AI

T1136.001 · Local Account

Affected Version Matrix 1

VendorProduct Version RangeStatus
misp misp < 2.5.40 affected
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I. Basic Information for CVE-2026-54360

Vulnerability Information
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Vulnerability Title
MISP sharing group creation mass assignment allows unauthorized takeover of existing sharing groups
Source: CVE Program / CVE List V5
Vulnerability Description
A mass assignment vulnerability exists in MISP’s sharing group creation endpoint. When creating a new sharing group, the controller did not remove a user-supplied id field before saving the submitted data. In CakePHP, supplying a primary key in the save data can cause a create() followed by save() operation to update an existing record instead of creating a new one. An authenticated user with permission to add sharing groups could therefore submit the identifier of an existing sharing group and modify that sharing group without passing the normal edit access-control checks. This may allow the attacker to take over or alter sharing groups they do not otherwise have access to, potentially affecting the confidentiality and integrity of information shared through those groups. Affected component: app/Controller/SharingGroupsController.php, add() action
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
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 2.5.40之前版本存在授权问题漏洞，该漏洞源于共享组创建端点存在批量赋值漏洞，控制器在保存提交数据前未移除用户提供的id字段，导致经过身份验证且具有添加共享组权限的用户可提交现有共享组的标识符并修改该共享组，从而可能接管或更改其原本无权访问的共享组，影响共享信息的机密性和完整性。
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 ~ 2.5.40 -

II. Public POCs for CVE-2026-54360

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III. Intelligence Information for CVE-2026-54360

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Patches & Fixes for CVE-2026-54360 (1)

Same Patch Batch · misp · 2026-06-12 · 12 CVEs total

CVE-2026-54358 MISP organization administrators can target site administrator accounts for password reset
CVE-2026-54362 MISP template builder exposes non-visible custom galaxies across organisations
CVE-2026-54359 MISP automation endpoints may be exposed to CSRF when Sec-Fetch-Site protection is disable
CVE-2026-54398 MISP object edit authorization bypass allows unauthorized sharing group assignment
CVE-2026-54396 MISP AuthKey edit endpoint allows authenticated user email enumeration
CVE-2026-54394 MISP organisation logo path traversal allows retrieval of arbitrary PNG/SVG files
CVE-2026-54357 MISP improper authorization allows organization administrators to modify site administrato
CVE-2026-54393 MISP Overmind theme stored XSS via unvalidated homepage setting
CVE-2026-54395 MISP UiBeta event index reflected XSS in advanced filter popup
CVE-2026-54397 MISP event editing allows unauthorized assignment to undisclosed sharing groups
CVE-2026-54361 MISP mass assignment vulnerabilities allow unauthorized modification of ownership and dele

IV. Related Vulnerabilities

Same product: misp
Same vendor: misp
Same weakness: CWE-639

V. Comments for CVE-2026-54360

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