arben-adm mcp-sequential-thinking up to 0.5.0 Import Session/Export Session server.py import_session/export_session file_path path traversal

Summaryinfo

A vulnerability classified as critical has been found in arben-adm mcp-sequential-thinking up to 0.5.0. The affected element is the function import_session/export_session of the file mcp_sequential_thinking/server.py of the component Import Session/Export Session. Performing a manipulation of the argument file_path results in path traversal. This vulnerability is identified as CVE-2026-81845. The attack can be initiated remotely. Additionally, an exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in arben-adm mcp-sequential-thinking up to 0.5.0. This affects the function import_session/export_session of the file mcp_sequential_thinking/server.py of the component Import Session/Export Session. The manipulation of the argument file_path with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-81845. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details and a public exploit are known. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

The exploit is shared for download at github.com. It is declared as proof-of-concept.

Upgrading to version 0.6.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 2fad3ee8ab1d0868b6c1afb5895bc336a10e5267 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Artificial Intelligence Software

Vendor

• arben-adm

Name

• mcp-sequential-thinking

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5.0

License

• open-source

Website

• Product: https://github.com/arben-adm/mcp-sequential-thinking/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Threat Intelligenceinfo

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Submitinfo

Accepted

• Submit #887254: arben-adm mcp-sequential-thinking <= 0.5.0 Fixed in 0.6.0 Path Traversal (by Mcfly_Zhang)

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