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 |
|---|---|---|---|---|
| 6.9 | Medium | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0075, the 55th percentile, on 6 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-8cgq-6mh2-7j6v
- OSV: GHSA-8cgq-6mh2-7j6v
- github.com/rack/rack/security/advisories/GHSA-8cgq-6mh2-7j6v
- nvd.nist.gov/vuln/detail/CVE-2025-27111
- github.com/rack/rack/commit/803aa221e8302719715e224f4476e438f2531a53
- github.com/rack/rack/commit/aeac570bb8080ca7b53b7f2e2f67498be7ebd30b
- github.com/rack/rack/commit/b13bc6bfc7506aca3478dc5ac1c2ec6fc53f82a3
- github.com/rack/rack
- github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2025-27111.yml
- lists.debian.org/debian-lts-announce/2025/03/msg00016.html