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CVE-2026-90893— MISP UserSettingsController CSRF Protection Bypass on setTheme, setHomePage, and eventIndexColumnToggle Endpoints

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 UserSettingsController 中存在跨站请求伪造（CSRF）漏洞。其中， 、 和 这三个操作被显式添加到了 Security 组件的 列表中，从而禁用了这些端点的所有 CSRF 验证（包括令牌和字段哈希检查）。由于这些端点接受 POST 请求并修改每位用户的应用状态（如主题选择、默认主页 URL 以及事件索引列的可见性），因此，如果攻击者能够诱使已登录的 MISP 用户加载一个恶意页面（例如通过精心构造的链接、嵌入的图片或自动提交的表单），就可以伪造请求，在用户不知情或未同意的情况下修

CVSS 5.1 · Medium
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I. Basic Information for CVE-2026-90893

Vulnerability Information
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Vulnerability Title
MISP UserSettingsController CSRF Protection Bypass on setTheme, setHomePage, and eventIndexColumnToggle Endpoints
Source: CVE Program / CVE List V5
Vulnerability Description
MISP contains a Cross-Site Request Forgery (CSRF) vulnerability in the UserSettingsController. The actions setTheme, setHomePage, and eventIndexColumnToggle were explicitly added to the Security component's unlockedActions list, which disabled all CSRF validation (both token and field-hash checks) for those endpoints. Because these endpoints accept POST requests and modify per-user application state (theme selection, default homepage URL, and event index column visibility), an attacker who can induce a logged-in MISP user to load a malicious page (e.g., via a crafted link, embedded image, or auto-submitting form) can forge requests that alter the victim's settings without their knowledge or consent. The most impactful action is setHomePage, which allows an attacker to redirect the victim's default landing page to an arbitrary attacker-controlled URL, potentially facilitating phishing or further social engineering. The setTheme action can alter the user's visual theme, and eventIndexColumnToggle can change which columns are displayed in the event index view. No authentication bypass is involved; the victim must already be authenticated to MISP. The vulnerability was reported by the Scottish Government National Cyber Team. Version affected: ≤2.5.45
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/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 ~ 2.5.46 -

II. Public POCs for CVE-2026-90893

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III. Intelligence Information for CVE-2026-90893

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Patches & Fixes for CVE-2026-90893 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-90893

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