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 |
|---|---|---|---|---|
| 6.5 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0063, the 50th 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-7fc5-f82f-cx69
- OSV: GHSA-7fc5-f82f-cx69
- github.com/ruby/net-imap/security/advisories/GHSA-7fc5-f82f-cx69
- nvd.nist.gov/vuln/detail/CVE-2025-25186
- github.com/ruby/net-imap/commit/70e3ddd071a94e450b3238570af482c296380b35
- github.com/ruby/net-imap/commit/c8c5a643739d2669f0c9a6bb9770d0c045fd74a3
- github.com/ruby/net-imap/commit/cb92191b1ddce2d978d01b56a0883b6ecf0b1022
- github.com/ruby/net-imap
- github.com/rubysec/ruby-advisory-db/blob/master/gems/net-imap/CVE-2025-25186.yml
- ruby.github.io/net-imap/Net/IMAP/AppendUIDData.html
- ruby.github.io/net-imap/Net/IMAP/CopyUIDData.html
- ruby.github.io/net-imap/Net/IMAP/UIDPlusData.html