CVE-2026-79750

HIGHPre-NVD 7.77.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 83% 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
7.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.7Exploit: Elevated riskExposed: 0

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

MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into separate endpoints with flexible routing strategies. Prior to version 1.0.30, MCPHub scopes non-admin users to servers they own (list views and config edits enforce ownership), but the tool-execution API does not. Any authenticated non-admin user can invoke tools on MCP servers owned by other users — servers they cannot even see in GET /api/servers. Because connected MCP servers carry real capability (filesystem, HTTP fetch, cloud APIs with the owner's keys), this is cross-tenant compromise: demonstrated arbitrary host file read (/etc/passwd, another user's secrets) and SSRF. This issue has been patched in version 1.0.30.

CVSS v3
7.7
EG Score
7.7(medium)
EG Risk
51(Track)
EG Risk 51/100SSVC: 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
Severity77% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

August 31, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Aug 31, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_release.
github_release Patch Available

v1.0.30

Patch available: samanhappy/mcphub v1.0.30

https://github.com/samanhappy/mcphub/releases/tag/v1.0.30
github Patch Available🟡 PoC Available

Authenticated horizontal IDOR: any non-admin user executes tools on other users' MCP servers (cross-tenant file read + SSRF) · Advisory · samanhappy/mcphub · GitHub

Affected: 0.12.15). This is an authenticated horizontal authorization gap on the tool-execu

https://github.com/samanhappy/mcphub/security/advisories/GHSA-wfqf-hqwq-8wvf

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 38× 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. 2026-09-21 04:10 UTCEG score recompute
  2. 2026-09-20 20:16 UTCEPSS rescore
  3. 2026-09-20 02:49 UTCEG score recompute
  4. 2026-09-19 01:18 UTCEG score recompute
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-17 23:58 UTCEG score recompute
  7. 2026-09-16 21:48 UTCEG score recompute
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 09:08 UTCEG score recompute
  10. 2026-09-16 05:15 UTCEPSS rescore
  11. 2026-09-15 07:22 UTCEG score recompute
  12. 2026-09-15 03:12 UTCEPSS rescore
  13. 2026-09-15 03:12 UTCEPSS rescore
  14. 2026-09-14 05:05 UTCEG score recompute
  15. 2026-09-12 15:05 UTCEG score recompute
  16. 2026-09-12 02:24 UTCEG score recompute
  17. 2026-09-11 14:53 UTCEPSS rescore
  18. 2026-09-11 14:53 UTCEPSS rescore
  19. 2026-09-11 13:43 UTCEG score recompute
  20. 2026-09-10 12:23 UTCEG score recompute
  21. 2026-09-09 09:52 UTCEG score recompute
  22. 2026-09-08 22:01 UTCEPSS rescore
  23. 2026-09-07 22:25 UTCEG score recompute
  24. 2026-09-06 21:02 UTCEG score recompute
  25. 2026-09-06 13:48 UTCEPSS rescore
Show 13 more
  1. 2026-09-05 19:41 UTCEG score recompute
  2. 2026-09-04 18:21 UTCEG score recompute
  3. 2026-09-04 05:40 UTCEG score recompute
  4. 2026-09-04 05:07 UTCEPSS rescore
  5. 2026-09-03 04:15 UTCEG score recompute
  6. 2026-09-02 15:34 UTCEG score recompute
  7. 2026-09-02 14:31 UTCEG score recompute
  8. 2026-09-02 14:12 UTCEPSS rescore
  9. 2026-09-01 19:46 UTCEG score recompute
  10. 2026-09-01 13:54 UTCEPSS rescore
  11. 2026-08-31 18:25 UTCEG score recompute
  12. 2026-08-31 18:02 UTCEG score recompute
  13. 2026-08-31 17:59 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-79750?
CVE-2026-79750 is a high vulnerability published on August 31, 2026. MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into separate endpoints with flexible routing strategies. Prior to version 1.0.30, MCPHub scopes non-admin users to servers they own (list views and config edits enforce ownership), but the…
When was CVE-2026-79750 disclosed?
CVE-2026-79750 was first published in the National Vulnerability Database on August 31, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-79750 actively exploited?
CVE-2026-79750 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 82.9% of all scored CVEs.
What is the CVSS score of CVE-2026-79750?
CVE-2026-79750 has a CVSS v3 base score of 7.7 (NVD).
How do I remediate CVE-2026-79750?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-79750, 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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