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 |
|---|---|---|---|---|
| 9.8 | Critical | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.024, the 83rd 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-v5h6-c2hv-hv3r
- OSV: GHSA-v5h6-c2hv-hv3r
- nvd.nist.gov/vuln/detail/CVE-2024-27280
- github.com/ruby/stringio/commit/0e596524097706263d10900ca180898e4a8f5233
- github.com/ruby/stringio/commit/c58c5f54f1eab99665ea6a161d29ff6a7490afc8
- hackerone.com/reports/1399856
- github.com/ruby/stringio
- github.com/rubysec/ruby-advisory-db/blob/master/gems/stringio/CVE-2024-27280.yml
- lists.debian.org/debian-lts-announce/2024/09/msg00000.html
- lists.fedoraproject.org/archives/list/[email protected]/message/27LUWREIFTP3MQAW7QE4PJM4DPAQJWXF
- lists.fedoraproject.org/archives/list/[email protected]/message/XYDHPHEZI7OQXTQKTDZHGZNPIJH7ZV5N
- security.netapp.com/advisory/ntap-20250502-0003
- www.ruby-lang.org/en/news/2024/03/21/buffer-overread-cve-2024-27280
- seclists.org/fulldisclosure/2025/Sep/53