CVE-2026-93328

CRITICALPre-NVD 9.39.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (45th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source

Also known asEUVD-2026-109936 (ENISA EUVD) · GHSA-2gc9-c85v-5vwr (GitHub Security Advisories)Source: ENISA EUVD

9.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Fixed versions, as the CVE record's CNA (Google Cloud) states them: "Upgrade googleapis/mcp-toolbox to version 1.5.0 or later."

Path Traversal and Missing Authorization in cloud-storage source in Google Cloud MCP Toolbox for Databases (googleapis/mcp-toolbox) versions 1.2.0 through 1.4.0 allows an unauthenticated remote attacker to exfiltrate host files to external Google Cloud Storage buckets and overwrite arbitrary local files via crafted tool invocation parameters.

CVSS
9.3
EG Score
9.3CRITICALmedium confidence
EG Risk
57
EG Risk 57/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity93% × 45%
Impact severity (EG Severity): CVSS 9.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
45th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.3): severity, escalated by confirmed exploitation. This CVE's 9.3 is its impact severity (EG Severity), not escalated.

EG Severity
9.3 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

October 26, 2026

Last Modified

October 26, 2026

Advisory Details (1)

Auto-updated Oct 26, 2026
Patch available. Sources: github_pr.
GitHub pull request Patch Available

feat(source/cloud-storage): restrict bucket and local path access

Patch available: googleapis/mcp-toolbox v1.5.0 (PR #3454 merged 2026-06-18)

https://github.com/googleapis/mcp-toolbox/pull/3454

Vendor Advisories for CVE-2026-93328(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 41× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-13 00:58 UTCEchelonGraph re-scored
  2. 2026-11-13 00:58 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  3. 2026-11-12 16:35 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  4. 2026-11-12 01:51 UTCEchelonGraph re-scored
  5. 2026-11-12 01:51 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  6. 2026-11-11 16:41 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  7. 2026-11-11 02:44 UTCEchelonGraph re-scored
  8. 2026-11-11 02:44 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  9. 2026-11-10 16:46 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  10. 2026-11-10 12:21 UTCEchelonGraph re-scored
  11. 2026-11-10 12:21 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  12. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  13. 2026-11-09 13:14 UTCEchelonGraph re-scored
  14. 2026-11-09 13:14 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  15. 2026-11-08 16:41 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  16. 2026-11-08 14:07 UTCEchelonGraph re-scored
  17. 2026-11-08 14:07 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  18. 2026-11-07 16:40 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  19. 2026-11-07 14:56 UTCEchelonGraph re-scored
  20. 2026-11-07 14:56 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  21. 2026-11-06 22:25 UTCOSV refresh
  22. 2026-11-06 16:40 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  23. 2026-11-06 15:49 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  24. 2026-11-05 16:41 UTCEchelonGraph re-scored
  25. 2026-11-05 16:41 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
Show 37 more
  1. 2026-11-05 16:39 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  2. 2026-11-04 17:33 UTCEchelonGraph re-scored
  3. 2026-11-04 17:33 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  4. 2026-11-04 16:37 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  5. 2026-11-03 18:25 UTCEchelonGraph re-scored
  6. 2026-11-03 18:25 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  7. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  8. 2026-11-03 07:08 UTCEchelonGraph re-scored
  9. 2026-11-03 07:08 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  10. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  11. 2026-11-02 07:59 UTCEchelonGraph re-scored
  12. 2026-11-02 07:59 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  13. 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  14. 2026-11-01 08:51 UTCEchelonGraph re-scored
  15. 2026-11-01 08:51 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  16. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  17. 2026-10-31 09:45 UTCEchelonGraph re-scored
  18. 2026-10-31 09:45 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  19. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  20. 2026-10-30 10:37 UTCEchelonGraph re-scored
  21. 2026-10-30 10:37 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  22. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  23. 2026-10-29 11:30 UTCEchelonGraph re-scored
  24. 2026-10-29 11:30 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  25. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  26. 2026-10-28 12:23 UTCEchelonGraph re-scored
  27. 2026-10-28 12:23 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  28. 2026-10-27 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  29. 2026-10-27 13:15 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  30. 2026-10-26 17:29 UTCEchelonGraph re-scored
  31. 2026-10-26 17:29 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  32. 2026-10-26 16:59 UTCEchelonGraph re-scored
  33. 2026-10-26 16:58 UTCGHSA enrichmentGHSA-2gc9-c85v-5vwr · GitHub severity CRITICAL
  34. 2026-10-26 16:01 UTCENISA EUVD ID recordedEUVD-2026-109936 · Source: ENISA EUVD
  35. 2026-10-26 15:26 UTCEchelonGraph re-scored
  36. 2026-10-26 15:04 UTCEchelonGraph re-scoredFirst assessed: 9.3 CRITICAL
  37. 2026-10-26 15:00 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-93328?
CVE-2026-93328 is a critical-severity vulnerability; its CVE record was published on October 26, 2026. Path Traversal and Missing Authorization in cloud-storage source in Google Cloud MCP Toolbox for Databases (googleapis/mcp-toolbox) versions 1.2.0 through 1.4.0 allows an unauthenticated remote attacker to exfiltrate host files to external Google Cloud Storage buckets and overwrite arbitrary local…
When was the CVE record for CVE-2026-93328 published?
The CVE record for CVE-2026-93328 was published on October 26, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 26, 2026; the record at its source may have been updated since.
Is CVE-2026-93328 actively exploited?
CVE-2026-93328 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (45th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-93328?
CVE-2026-93328 has a CVSS base score of 9.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-93328?
A fix for CVE-2026-93328 is available: update to the fixed version the vendor names in its advisory. Fixed versions, as the CVE record's CNA (Google Cloud) states them: "Upgrade googleapis/mcp-toolbox to version 1.5.0 or later." The vendor advisories EchelonGraph has for CVE-2026-93328 are linked in the Vendor Advisories panel on this page.

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