CIRCL MISP up to 2.5.46 Installer Script misp_install.log information disclosure

Summaryinfo

A vulnerability, which was classified as problematic, was found in CIRCL MISP up to 2.5.46. Impacted is an unknown function of the file /var/log/misp_install.log of the component Installer Script. Executing a manipulation can lead to information disclosure. The identification of this vulnerability is CVE-2026-95667. The attack can only be executed locally. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in CIRCL MISP up to 2.5.46 and classified as problematic. This vulnerability affects some unknown functionality of the file /var/log/misp_install.log of the component Installer Script. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

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

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-95667 since 09/22/2026. The exploitation appears to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

By approaching the search of inurl:var/log/misp_install.log it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 2.5.47 eliminates this vulnerability. Applying the patch d5d72ab38 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-84379). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• CIRCL

Name

• MISP

Version

• 2.5.0
• 2.5.1
• 2.5.2
• 2.5.3
• 2.5.4
• 2.5.5
• 2.5.6
• 2.5.7
• 2.5.8
• 2.5.9
• 2.5.10
• 2.5.11
• 2.5.12
• 2.5.13
• 2.5.14
• 2.5.15
• 2.5.16
• 2.5.17
• 2.5.18
• 2.5.19
• 2.5.20
• 2.5.21
• 2.5.22
• 2.5.23
• 2.5.24
• 2.5.25
• 2.5.26
• 2.5.27
• 2.5.28
• 2.5.29
• 2.5.30
• 2.5.31
• 2.5.32
• 2.5.33
• 2.5.34
• 2.5.35
• 2.5.36
• 2.5.37
• 2.5.38
• 2.5.39
• 2.5.40
• 2.5.41
• 2.5.42
• 2.5.43
• 2.5.44
• 2.5.45
• 2.5.46

License

• open-source

CPE 2.3info

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CPE 2.2info

• 🔒
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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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