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CVE-2026-10856— Open redirect in MISP dashboard button widget URL handling

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存在安全漏洞，该漏洞源于URL验证缺陷，可能导致攻击者配置一个看似指向应用内部但实际重定向用户到攻击者控制站点的按钮。

AI Predicted 6.1 Difficulty: Moderate EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1566.001 · Spearphishing Attachment

Affected Version Matrix 1

VendorProduct Version RangeStatus
misp misp ≤ 2.5.38 affected
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I. Basic Information for CVE-2026-10856

Vulnerability Information
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Vulnerability Title
Open redirect in MISP dashboard button widget URL handling
Source: CVE Program / CVE List V5
Vulnerability Description
A URL validation flaw in the MISP dashboard button widget allowed a crafted relative-looking URL to be accepted as a local path while being interpreted by browsers as an external URL. The validation rejected URLs containing an explicit scheme, host, or user component, but did not reject paths beginning with a slash followed by a backslash, such as /\example.com. Some browsers normalize backslashes in URLs as forward slashes, which can turn this into a scheme-relative external navigation target. In addition, the generated href concatenated the reconstructed URL with the original URL, increasing the possibility of unsafe or malformed link generation. An attacker able to configure or influence a dashboard button URL could craft a button that appears to point inside the application but redirects users to an attacker-controlled site when clicked. This could be used for phishing, credential theft, or social engineering. The patch fixes the issue by rejecting empty paths and paths starting with /\, and by emitting only the reconstructed validated URL in the anchor href.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/U:Green
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
MISP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MISP是MISP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存在安全漏洞，该漏洞源于URL验证缺陷，可能导致攻击者配置一个看似指向应用内部但实际重定向用户到攻击者控制站点的按钮。
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 ~ 2.5.38 -

II. Public POCs for CVE-2026-10856

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III. Intelligence Information for CVE-2026-10856

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Patches & Fixes for CVE-2026-10856 (1)

Same Patch Batch · misp · 2026-06-04 · 8 CVEs total

CVE-2026-10860 MISP CRUDComponent delete validation bypass via operator precedence error
CVE-2026-10854 Unauthorized exposure of private galaxies in MISP event template creation
CVE-2026-10863 MISP User-controlled order parameter in correlations over-correlation endpoint
CVE-2026-10864 MISP Dashboard widget field selection may expose restricted user and organisation data
CVE-2026-10868 MISP user edit endpoint mass assignment vulnerability allows unauthorized user account mod
CVE-2026-10861 MISP post-login open redirect via pre_login_requested_url
CVE-2026-10855 MISP Event template importer authorization bypass

IV. Related Vulnerabilities

Same product: misp
Same vendor: misp
Same weakness: CWE-601