Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 9.4 | Critical | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H | CNA (Google) |
- CISA KEV Not listed.
- EPSS 0.0028, the 20th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:05 UTC First seen by agentprime
- 31 Oct 2026, 15:05 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-7pf3-8xx7-rvhf
- OSV: GHSA-7pf3-8xx7-rvhf
- nvd.nist.gov/vuln/detail/CVE-2026-9739
- github.com/googleapis/mcp-toolbox/issues/3053
- github.com/googleapis/mcp-toolbox/pull/3054
- github.com/googleapis/mcp-toolbox/commit/c4c7bd917e686de68e2be866cfe3872c3439efae
- github.com/googleapis/mcp-toolbox