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CVE-2026-95806— MISP: PHP phar stream wrapper enables deserialization and code execution via caller-influenced filesystem paths

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 在其 Web 入口点和控制台入口点中均注册了 PHP 的 流包装器。 流包装器会导致 PHP 将一个 归档文件视为目录，从而带来以下两个安全后果： 对由调用者可影响的路径执行的任何文件系统操作，如果该路径解析到一个 归档文件，将隐式触发 调用，从而形成一个反序列化漏洞利用点； 若应用根目录被重新定位，攻击者可以通过上传的 文件访问其中的可执行代码，从而以 Web 用户的身份实现任意代码执行。 MISP 本身、其内置的 CakePHP 框架，或任何在运行时加载的库均不会读取或构造 归档文件。因此，该流包装器

CVSS 7.7 · High EPSS 0.39% · P34

Affected Version Matrix 1

VendorProduct Version RangeStatus
MISP MISP < 2.5.47 affected
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I. Basic Information for CVE-2026-95806

Vulnerability Information
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Vulnerability Title
MISP: PHP phar stream wrapper enables deserialization and code execution via caller-influenced filesystem paths
Source: CVE Program / CVE List V5
Vulnerability Description
MISP ships with PHP's phar stream wrapper registered in both its web entry point and its console entry point.  The phar stream wrapper causes PHP to treat a phar archive as a directory, which has two security consequences:    - any filesystem operation on a caller-influenced path that resolves to a phar archive triggers an implicit unserialize() call, creating a deserialization sink;  - a relocated application root can reach executable code inside an uploaded phar file, enabling arbitrary code execution as the web user. No component of MISP, the vendored CakePHP framework, or any runtime-loaded library reads or constructs phar archives. The wrapper therefore serves no legitimate purpose in the MISP runtime and exists solely as an available primitive for an attacker who can influence a filesystem path argument.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
MISP MISP 0 ~ 2.5.47 -

II. Public POCs for CVE-2026-95806

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III. Intelligence Information for CVE-2026-95806

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Patches & Fixes for CVE-2026-95806 (1)

Same Patch Batch · MISP · 2026-09-22 · 19 CVEs total

CVE-2026-95658 6.9 MEDIUM MISP CSRF vulnerability in workflow moduleStatelessExecution allows cross-site execution o
CVE-2026-95754 6.9 MEDIUM MISP: Disabled-user check ineffective in pre-authentication TOTP login branch
CVE-2026-95679 6.9 MEDIUM MISP Unauthenticated Blind SSRF via XML Body Processing
CVE-2026-95667 6.9 MEDIUM MISP Installer Log and FIFO Created World-Readable, Exposing Sensitive Credentials
CVE-2026-95693 5.3 MEDIUM MISP Information Disclosure via Forged Upload Path
CVE-2026-95805 5.3 MEDIUM MISP ACLComponent: Typo in previewEventAttributes ACL key bypasses intended access restric
CVE-2026-95698 5.3 MEDIUM MISP Path Traversal in OrgImgHelper findOrgImage via Crafted Organization Name
CVE-2026-95671 5.3 MEDIUM MISP Collections: Missing Authorization Check for Sharing Group on PUT Request in collecti
CVE-2026-95685 5.3 MEDIUM MISP Missing Authorization on replaceSuggestionInReport Event Report Action
CVE-2026-95674 5.3 MEDIUM MISP EventsController queryEnrichment allows querying unavailable or legacy modules withou
CVE-2026-95683 5.3 MEDIUM MISP Overmind Event View Discloses Report Content Bypassing Report-Level ACL
CVE-2026-95697 5.3 MEDIUM MISP: Insufficient Authorization Allows Sharing Group Editors to Overwrite Organization Me
CVE-2026-95661 5.1 MEDIUM MISP Reflected Cross-Site Scripting in Attribute Histogram via Unescaped URL-Supplied Type
CVE-2026-95665 5.1 MEDIUM MISP Reflected Cross-Site Scripting in Event Export Confirmation Form via Unescaped JSON
CVE-2026-95703 5.1 MEDIUM MISP OrganisationsController File Existence and Image-Type Oracle via Forged Upload tmp_na
CVE-2026-95701 5.1 MEDIUM MISP Path Traversal via Organization Name in Org-Statistics Logo Check
CVE-2026-95659 4.8 MEDIUM MISP Reflected XSS via Unvalidated Object Type in AnalystData Overmind Thread
CVE-2026-95682 4.8 MEDIUM MISP Stored Cross-Site Scripting via Unescaped Organization Name in Admin Email View

IV. Related Vulnerabilities

Same product: MISP
Same vendor: MISP
Same weakness: CWE-502