CVE-2020-11076
HIGH7.5EPSS 1.8%HTTP Smuggling via Transfer-Encoding Header in Puma
Published: 5/22/2020Modified: 4/28/2026
Description
In Puma (RubyGem) before 4.3.4 and 3.12.5, an attacker could smuggle an HTTP response, by using an invalid transfer-encoding header. The problem has been fixed in Puma 3.12.5 and Puma 4.3.4.
Affected packages (3)
- Debian/pumafrom 0, < 4.3.6-1
- Debian/pumafrom 0, < 3.6.0-1+deb9u1
- RubyGems/pumafrom 0, < 3.12.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
References (11)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2020-11076
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2020-11076
- PATCHhttps://github.com/puma/puma
- WEBhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00034.html
- WEBhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00038.html
- WEBhttps://github.com/puma/puma/blob/master/History.md#434435-and-31253126--2020-05-22
- WEBhttps://github.com/puma/puma/commit/f24d5521295a2152c286abb0a45a1e1e2bd275bd
- WEBhttps://github.com/puma/puma/security/advisories/GHSA-x7jg-6pwg-fx5h
- WEBhttps://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2020-11076.yml
- WEBhttps://lists.debian.org/debian-lts-announce/2020/10/msg00009.html
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/SKIY5H67GJIGJL6SMFWFLUQQQR3EMVPR