Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-85236— MISP cullEmptyEvents CSRF Allows Irreversible Deletion of Events via GET Request

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 2.5.45及之前版本存在跨站请求伪造漏洞，该漏洞源于cullEmptyEvents动作存在跨站请求伪造漏洞，该端点接受HTTP GET请求并执行状态改变且不可逆的操作，由于无body的GET请求不受CakePHP的CSRF验证保护，可能导致攻击者诱导已认证用户加载恶意URL，从而在无需用户交互的情况下删除已发布的空事件，且因操作使用skipBloc

CVSS 8.8 · High EPSS 0.25% · P16

Affected Version Matrix 1

VendorProduct Version RangeStatus
misp misp ≤ 2.5.45 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-85236

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
MISP cullEmptyEvents CSRF Allows Irreversible Deletion of Events via GET Request
Source: CVE Program / CVE List V5
Vulnerability Description
A cross-site request forgery (CSRF) vulnerability existed in the cullEmptyEvents action of MISP. The endpoint performed a state-changing and irreversible operation while accepting HTTP GET requests. Because bodyless GET requests are not subject to CakePHP's CSRF validation, an attacker could cause an authenticated MISP user with sufficient privileges to invoke the endpoint simply by causing their browser to load a crafted URL, for example through an embedded image or other automatically requested resource. Successful exploitation triggers the deletion of published empty events. The deletion is particularly significant because the operation uses skipBlocklist, meaning the removed events do not leave blocklist entries that could prevent or track their subsequent synchronization. This can result in unintended and potentially irreversible deletion of MISP event records without explicit user interaction. The vulnerability was addressed by restricting cullEmptyEvents to HTTP POST requests, ensuring that CakePHP's normal CSRF protections are applied to the operation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/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
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 2.5.45及之前版本存在跨站请求伪造漏洞，该漏洞源于cullEmptyEvents动作存在跨站请求伪造漏洞，该端点接受HTTP GET请求并执行状态改变且不可逆的操作，由于无body的GET请求不受CakePHP的CSRF验证保护，可能导致攻击者诱导已认证用户加载恶意URL，从而在无需用户交互的情况下删除已发布的空事件，且因操作使用skipBloc
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 ~ 2.5.45 -

II. Public POCs for CVE-2026-85236

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-85236

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-85236 (5)

Same Patch Batch · misp · 2026-09-03 · 9 CVEs total

CVE-2026-85216 9.5 CRITICAL MISP LDAP and LinOTP Authentication Bypass via Empty or Invalid Credentials
CVE-2026-85237 8.6 HIGH Missing Rate Limiting in Email OTP Verification Allows Brute-Force Authentication Bypass
CVE-2026-85221 7.6 HIGH MISP CurlClient TLS Peer Verification Disabled by Default Enables Man-in-the-Middle Attack
CVE-2026-85238 7.6 HIGH Session Fixation in MISP CustomAuth Authentication Allows Session Hijacking
CVE-2026-85239 7.1 HIGH MISP Event Template Definition Validation Bypass Allows Persistent Denial of Service
CVE-2026-85227 6.1 MEDIUM Reflected Cross-Site Scripting in MISP Event Filtering via taggedAttributes and galaxyAtta
CVE-2026-85226 5.3 MEDIUM MISP OnDemand Correlation Engine Missing Access Control Allows Disclosure of Restricted Co
CVE-2026-85230 5.3 MEDIUM MISP Dashboard Button Widget Allows Persistent JavaScript URL Injection

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-85236

No comments yet

Leave a comment