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.
CVE-2026-81845
MEDIUMPre-NVD 6.36.3—Trending — 5 sources updated this week
EchelonGraph scoreHIGH confidence
Score 6.3 from GitHub Security Advisory (severity: LOW) published 2026-08-28. a secondary CVSS source baseline 6.3; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.3
- EG Score
- 6.3(high)
- EG Risk
- 33(Track)EG Risk 33/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity63% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 26%
- KEV
- Not listed
Published
August 27, 2026
Last Modified
August 28, 2026
Advisory Details (5)
Auto-updated Aug 27, 2026Patch available. Sources: github_pr, github_commit, github_release.
generic
GitHub - arben-adm/mcp-sequential-thinking · GitHub
https://github.com/arben-adm/mcp-sequential-thinking/github_release Patch Available
v0.6.0
Patch available: arben-adm/mcp-sequential-thinking v0.6.0
https://github.com/arben-adm/mcp-sequential-thinking/releases/tag/v0.6.0github_commit Patch Available
commit 2fad3ee8ab1d (arben-adm/mcp-sequential-thinking)
Patch available: arben-adm/mcp-sequential-thinking v0.6.0 (contains commit 2fad3ee8ab1d)
https://github.com/arben-adm/mcp-sequential-thinking/commit/2fad3ee8ab1d0868b6c1afb5895bc336a10e5267github_pr Patch Available
Fix audit blockers: path traversal, save race, corrupt-file handling + hardening
Patch available: arben-adm/mcp-sequential-thinking v0.6.0 (PR #18 merged 2026-06-13)
https://github.com/arben-adm/mcp-sequential-thinking/pull/18generic
[Potential Vulnerability] Arbitrary file read/write via `import_session` and `export_session` in `mcp-sequential-thinking` · Issue #17 · arben-adm/mcp-sequential-thinking · GitHub
https://github.com/arben-adm/mcp-sequential-thinking/issues/17Vendor Advisories for CVE-2026-81845(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 10× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-08-30 01:22 UTCEPSS rescore
- 2026-08-29 14:05 UTCEG score recompute
- 2026-08-29 14:05 UTCGHSA enrichment
- 2026-08-28 21:42 UTCEPSS rescore
- 2026-08-28 15:18 UTCEG score recompute
- 2026-08-28 15:17 UTCGHSA enrichment
- 2026-08-28 00:31 UTCEG score recompute
- 2026-08-28 00:26 UTCNVD updateCVSS v4 → 2.1
- 2026-08-27 23:23 UTCEG score recompute
- 2026-08-27 23:22 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-81845?
CVE-2026-81845 is a medium vulnerability published on August 27, 2026. A vulnerability has been found in arben-adm mcp-sequential-thinking up to 0.5.0. Impacted is the function importsession/exportsession of the file mcpsequentialthinking/server.py of the component Import Session/Export Session. Such manipulation of the argument file_path leads to path traversal. It…
When was CVE-2026-81845 disclosed?
CVE-2026-81845 was first published in the National Vulnerability Database on August 27, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-81845 actively exploited?
CVE-2026-81845 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 73.8% of all scored CVEs.
What is the CVSS score of CVE-2026-81845?
CVE-2026-81845 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-81845?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-81845, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-81845
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