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CVE-2026-81845— arben-adm mcp-sequential-thinking Import Session/Export Session server.py export_session path traversal

Quick assessment

Affected
arben-adm mcp-sequential-thinking
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.

在 arben-adm/mcp-sequential-thinking（版本 ≤ 0.5.0）中发现了安全漏洞。受影响的是 mcp_sequential_thinking/server.py 文件中“导入会话/导出会话”（Import Session/Export Session）组件里的 import_session/export_session 函数。对该函数中 file_path 参数的不当处理导致了路径遍历（Path Traversal）漏洞。该攻击可以远程发起，且漏洞利用方式已向公众披露，可能被实际利用。

CVSS 6.3 · Medium EPSS 0.34% · P26

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery

Affected Version Matrix 6

VendorProduct Version RangeStatus
arben-adm mcp-sequential-thinking 0.1 affected
0.2 affected
0.3 affected
0.4 affected
0.5.0 affected
0.6.0 unaffected
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I. Basic Information for CVE-2026-81845

Vulnerability Information
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Vulnerability Title
arben-adm mcp-sequential-thinking Import Session/Export Session server.py export_session path traversal
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been found in arben-adm mcp-sequential-thinking up to 0.5.0. Impacted is the function import_session/export_session of the file mcp_sequential_thinking/server.py of the component Import Session/Export Session. Such manipulation of the argument file_path leads to path traversal. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 0.6.0 is recommended to address this issue. The name of the patch is 2fad3ee8ab1d0868b6c1afb5895bc336a10e5267. Upgrading the affected component is recommended.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
arben-adm mcp-sequential-thinking 0.1 cpe:2.3:a:arben-adm:mcp-sequential-thinking:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-81845

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III. Intelligence Information for CVE-2026-81845

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Patches & Fixes for CVE-2026-81845 (1)

Vendor Advisories for CVE-2026-81845 (2)

Proof of Concept for CVE-2026-81845 (1)

Security Blog Posts for CVE-2026-81845 (1)

Vendor Pages for CVE-2026-81845 (1)

Other References for CVE-2026-81845 (1)

IV. Related Vulnerabilities

Same weakness: CWE-22

V. Comments for CVE-2026-81845

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