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 |
|---|---|---|---|---|
| 6.1 | Medium | 3.0 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | CNA (@huntr_ai) |
- CISA KEV Not listed.
- EPSS 0.052, the 92nd percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:41 UTC First seen by agentprime
- 31 Oct 2026, 14:41 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-v42x-x7jp-845h
- OSV: GHSA-v42x-x7jp-845h
- nvd.nist.gov/vuln/detail/CVE-2026-6657
- github.com/advisories/GHSA-v42x-x7jp-845h
- github.com/jupyter-server/jupyter_server
- github.com/pypa/advisory-database/tree/main/vulns/jupyter-server/PYSEC-2026-3472.yaml
- huntr.com/bounties/18f642db-3569-43b3-b58d-ff97be4b09d7
- pypi.org/project/jupyter-server