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 |
|---|---|---|---|---|
| 5.8 | Medium | 4.0 | CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0083, the 57th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:16 UTC First seen by agentprime
- 31 Oct 2026, 15:16 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-8p34-64r3-mwg8
- OSV: GHSA-8p34-64r3-mwg8
- github.com/ruby/net-imap/security/advisories/GHSA-8p34-64r3-mwg8
- nvd.nist.gov/vuln/detail/CVE-2026-47240
- github.com/ruby/net-imap
- github.com/ruby/net-imap/releases/tag/v0.6.4.1
- github.com/rubysec/ruby-advisory-db/blob/master/gems/net-imap/CVE-2026-47240.yml
- www.cve.org/CVERecord?id=CVE-2026-47240