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:L/UI:R/S:C/C:L/I:L/A:L | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.025, the 85th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 27 Feb 2020, 19:16 UTC Published by the maintainers as a GitHub repository advisory
Sources
- GitHub Advisory Database: GHSA-84j7-475p-hp8v
- OSV: GHSA-84j7-475p-hp8v
- github.com/puma/puma/security/advisories/GHSA-84j7-475p-hp8v
- nvd.nist.gov/vuln/detail/CVE-2020-5247
- github.com/puma/puma/commit/c36491756f68a9d6a8b3a49e7e5eb07fe6f1332f
- github.com/puma/puma
- github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2020-5247.yml
- lists.debian.org/debian-lts-announce/2022/05/msg00034.html
- lists.fedoraproject.org/archives/list/[email protected]/message/BMJ3CGZ3DLBJ5WUUKMI5ZFXFJQMXJZIK
- lists.fedoraproject.org/archives/list/[email protected]/message/DIHVO3CQMU7BZC7FCTSRJ33YDNS3GFPK
- lists.fedoraproject.org/archives/list/[email protected]/message/NJ3LL5F5QADB6LM46GXZETREAKZMQNRD
- owasp.org/www-community/attacks/HTTP_Response_Splitting
- www.ruby-lang.org/en/news/2019/10/01/http-response-splitting-in-webrick-cve-2019-16254