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 |
|---|---|---|---|---|
| 7.0 | High | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N | CNA (EEF) |
- CISA KEV Not listed.
- EPSS 0.0061, the 49th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:25 UTC First seen by agentprime
- 31 Oct 2026, 15:25 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-r4h8-2xpq-v48g
- OSV: GHSA-r4h8-2xpq-v48g
- github.com/livebook-dev/livebook/security/advisories/GHSA-r4h8-2xpq-v48g
- cna.erlef.org/cves/CVE-2026-66881.html
- github.com/livebook-dev/livebook/commit/1443dd23df6e7b9203b6797f0695a807aeb81dde
- github.com/livebook-dev/livebook/commit/acf4cb8c0c79b89c795b180f061be7de2d8b5aa9
- github.com/livebook-dev/livebook/commit/50f86982ebf36c22abeb379b55ec0f2859c83bb9
- hex.pm/packages/livebook