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CVE-2026-95667— MISP Installer Log and FIFO Created World-Readable, Exposing Sensitive Credentials

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.

The MISP installer scripts (for Debian 12, Debian 13, Ubuntu 24.04, and RHEL 9.4) create a log file at /var/log/misp_install.log and a named pipe (FIFO) at /var/log/misp_install.log.pipe to capture all installer output. The log captures highly sensitive data i

CVSS 6.9 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
MISP MISP < 2.5.47 affected
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I. Basic Information for CVE-2026-95667

Vulnerability Information

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Vulnerability Title
MISP Installer Log and FIFO Created World-Readable, Exposing Sensitive Credentials
Source: CVE Program / CVE List V5
Vulnerability Description
The MISP installer scripts (for Debian 12, Debian 13, Ubuntu 24.04, and RHEL 9.4) create a log file at /var/log/misp_install.log and a named pipe (FIFO) at /var/log/misp_install.log.pipe to capture all installer output. The log captures highly sensitive data including the generated admin password, database passwords, GPG passphrase, and supervisor password. However, the log file was created by the tee command under the system default umask, resulting in world-readable permissions (typically 0644). Similarly, the FIFO was created with mkfifo without an explicit mode, also inheriting the default umask and remaining world-readable during the window before it was unlinked.  Any local unprivileged user on the system could read the log file or the FIFO to obtain these credentials.  Additionally, the log file was not removed before creation, meaning a pre-existing symlink in /var/log could have been used to redirect the write to an arbitrary location. Version affected: <2.5.47
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键资源的不正确权限授予
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-2026-95667

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III. Intelligence Information for CVE-2026-95667

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Patches & Fixes for CVE-2026-95667 (1)

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

CVE-2026-95806 7.7 HIGH MISP: PHP phar stream wrapper enables deserialization and code execution via caller-influe
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-2026-95693 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-732

V. Comments for CVE-2026-95667

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