CVE-2026-105789

MEDIUMPre-NVD 5.45.4
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 5.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: secondary
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 5.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Microsoft UFO is an open-source framework for intelligent automation across devices and platforms. Prior to 3.0.9, the execute_command tool in ufo/client/mcp/http_servers/linux_mcp_server.py treats sort and uniq as read-only commands while the free-form command parameter can select their file-output forms. An authenticated caller can use sort -o or the optional second uniq operand to create or overwrite files writable by the UFO server process without shell metacharacters, because the allowed binary opens the destination itself and the argument policy does not reject the operation. This can corrupt configuration or other writable data and disrupt the service, but the demonstrated primitive does not directly disclose files or establish arbitrary code execution. This issue is fixed in version 3.0.9.

CVSS v3
5.4
EG Score
5.4MEDIUMlow confidence
EG Risk
24
EG Risk 24/100CISA SSVC

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 computed
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
—
EPSS %ILE
—
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

October 6, 2026

Last Modified

October 6, 2026

Advisory Details (4)

Auto-updated Oct 6, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github_commit, github_release, github.
github_release Patch Available

Fixed security issues.

Patch available: microsoft/UFO v3.0.9

https://github.com/microsoft/UFO/releases/tag/v3.0.9
github_commit Patch Available

commit 4f793622794f (microsoft/UFO)

Patch available: microsoft/UFO v3.0.9 (contains commit 4f793622794f)

https://github.com/microsoft/UFO/commit/4f793622794f5d47810d54bed431c61f6a781dd6
github_pr Patch Available

fix MSRC139482: UFO - ufo/client/mcp/http_servers/linux_mcp_server.py…

Patch available: microsoft/UFO v3.0.9 (PR #349 merged 2026-09-02)

https://github.com/microsoft/UFO/pull/349
githubMentions a patch (unverified)🟡 PoC Available

Arbitrary file write in the Linux MCP `execute_command` tool · Advisory · microsoft/UFO · GitHub

https://github.com/microsoft/UFO/security/advisories/GHSA-85w2-wggf-rw49

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 5× 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.

  1. 2026-10-06 15:27 UTCEG score recompute
  2. 2026-10-06 14:55 UTCEG score recompute
  3. 2026-10-06 14:30 UTCEG score recompute
  4. 2026-10-06 14:10 UTCEG score recompute
  5. 2026-10-06 14:09 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2026-105789?
CVE-2026-105789 is a medium vulnerability published on October 6, 2026. Microsoft UFO is an open-source framework for intelligent automation across devices and platforms. Prior to 3.0.9, the executecommand tool in ufo/client/mcp/httpservers/linuxmcpserver.py treats sort and uniq as read-only commands while the free-form command parameter can select their file-output…
When was CVE-2026-105789 disclosed?
CVE-2026-105789 was first published on October 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-105789?
CVE-2026-105789 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-105789?
A fix for CVE-2026-105789 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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