CVE-2026-62316

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 71% of all CVEs by exploit prediction. 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: epss, secondary
Elevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Microsoft UFO open-source framework for intelligent automation across devices and platforms. Prior to 3.0.8, ufo/client/mcp/http_servers/linux_mcp_server.py binds a FastMCP streamable HTTP server to localhost:8010 but does not validate the Host, Origin, or Sec-Fetch-Site headers. An attacker-controlled web page can use DNS rebinding to reach the local /mcp endpoint, enumerate tool schemas through tools/list, and invoke execute_command with a valid UFO_MCP_API_KEY to read files or execute allowed operating system commands as the victim's user. This issue is fixed in version 3.0.8.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: 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 computed
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

August 21, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Aug 21, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github, github_commit.
github_release Patch Available

v3.0.8

Patch available: microsoft/UFO v3.0.8

https://github.com/microsoft/UFO/releases/tag/v3.0.8
github_commit Patch Available

commit 3851c5d4e17c (microsoft/UFO)

Patch available: microsoft/UFO v3.0.8 (contains commit 3851c5d4e17c)

https://github.com/microsoft/UFO/commit/3851c5d4e17c2865c56a94a6530692bf6e7a9b02
github Patch Available🟡 PoC Available

DNS Rebinding → Unauthenticated File Read / Command Execution · Advisory · microsoft/UFO · GitHub

https://github.com/microsoft/UFO/security/advisories/GHSA-vf4c-mf32-gf2h

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 49× 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. 2026-09-19 23:15 UTCEG score recompute
  2. 2026-09-19 00:13 UTCEG score recompute
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 01:12 UTCEG score recompute
  5. 2026-09-16 14:40 UTCEG score recompute
  6. 2026-09-16 14:08 UTCEPSS rescore
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 04:09 UTCEG score recompute
  9. 2026-09-13 17:38 UTCEG score recompute
  10. 2026-09-12 18:38 UTCEG score recompute
  11. 2026-09-11 19:37 UTCEG score recompute
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 09:37 UTCEPSS rescore
  14. 2026-09-10 20:36 UTCEG score recompute
  15. 2026-09-09 01:45 UTCEG score recompute
  16. 2026-09-08 22:01 UTCEPSS rescore
  17. 2026-09-07 16:16 UTCEG score recompute
  18. 2026-09-07 16:01 UTCEPSS rescore
  19. 2026-09-06 17:15 UTCEG score recompute
  20. 2026-09-06 13:47 UTCEPSS rescore
  21. 2026-09-05 18:15 UTCEG score recompute
  22. 2026-09-04 19:13 UTCEG score recompute
  23. 2026-09-04 07:43 UTCEG score recompute
  24. 2026-09-04 05:07 UTCEPSS rescore
  25. 2026-09-02 20:59 UTCEG score recompute
Show 24 more
  1. 2026-09-02 14:12 UTCEPSS rescore
  2. 2026-09-01 21:15 UTCEG score recompute
  3. 2026-09-01 13:54 UTCEPSS rescore
  4. 2026-09-01 09:45 UTCEG score recompute
  5. 2026-09-01 04:40 UTCEPSS rescore
  6. 2026-08-30 23:10 UTCEG score recompute
  7. 2026-08-30 19:17 UTCEPSS rescore
  8. 2026-08-30 11:40 UTCEG score recompute
  9. 2026-08-30 01:22 UTCEPSS rescore
  10. 2026-08-29 01:06 UTCEG score recompute
  11. 2026-08-28 21:42 UTCEPSS rescore
  12. 2026-08-28 00:55 UTCEG score recompute
  13. 2026-08-27 14:25 UTCEPSS rescore
  14. 2026-08-27 01:54 UTCEG score recompute
  15. 2026-08-26 14:46 UTCEPSS rescore
  16. 2026-08-25 15:23 UTCEG score recompute
  17. 2026-08-25 14:35 UTCEG score recompute
  18. 2026-08-25 13:49 UTCEPSS rescore
  19. 2026-08-24 18:26 UTCEG score recompute
  20. 2026-08-23 07:54 UTCEG score recompute
  21. 2026-08-23 00:19 UTCEPSS rescore
  22. 2026-08-21 21:24 UTCEG score recompute
  23. 2026-08-21 20:34 UTCEG score recompute
  24. 2026-08-21 20:34 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-62316?
CVE-2026-62316 is a high vulnerability published on August 21, 2026. Microsoft UFO open-source framework for intelligent automation across devices and platforms. Prior to 3.0.8, ufo/client/mcp/httpservers/linuxmcpserver.py binds a FastMCP streamable HTTP server to localhost:8010 but does not validate the Host, Origin, or Sec-Fetch-Site headers. An…
When was CVE-2026-62316 disclosed?
CVE-2026-62316 was first published in the National Vulnerability Database on August 21, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-62316 actively exploited?
CVE-2026-62316 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 70.6% of all scored CVEs.
What is the CVSS score of CVE-2026-62316?
CVE-2026-62316 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-62316?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62316, 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

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