CVE catalog
CVE-2020-11076
puma: CVE-2020-11076
- Severity
- Medium · CVSS 6.8
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 4.09% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | puma | sid | 8.0.2-3 | fixed |
| Debian | puma | forky | 8.0.2-3 | fixed |
| Debian | puma | trixie | 6.6.0-4 | fixed |
| Debian | puma | bookworm | 5.6.5-3+deb12u1 | fixed |
| Debian | puma | bookworm-security | 5.6.5-3+deb12u2 | fixed |
| Ubuntu | puma | pro | 4.3.6-1ubuntu4 | vulnerable |
| Ubuntu | puma | pro | 5.5.2-2ubuntu2 | vulnerable |
| Ubuntu | puma | pro | 5.5.2-2ubuntu2+esm1 | fixed |
| Opensuse | rubygem-puma | leap 15.2 | 4.3.5-lp152.4.3.1 | fixed |
| Ubuntu | puma | pro | 3.12.0-2ubuntu1 | vulnerable |
| Ubuntu | puma | pro | 3.12.0-4ubuntu1 | vulnerable |
| Ubuntu | puma | pro | 3.12.4-1ubuntu2 | vulnerable |
| Ubuntu | puma | pro | 3.12.4-1ubuntu2+esm1 | fixed |
| Suse | rubygem-puma | linux enterprise high availability extension 15 | 4.3.5-3.3.1 | fixed |
| Suse | rubygem-puma | linux enterprise high availability extension 15 sp1 | 4.3.5-3.3.1 | fixed |
| Suse | rubygem-puma | linux enterprise high availability extension 15 sp2 | 4.3.5-3.3.1 | fixed |
| Opensuse | rubygem-puma | leap 15.1 | 4.3.5-lp151.3.3.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | puma | source | sid | 4.3.6-1 | not yet assigned | Not reported | [972102] |
| Debian | puma | source | forky | 4.3.6-1 | not yet assigned | Not reported | [972102] |
| Debian | puma | source | trixie | 4.3.6-1 | not yet assigned | Not reported | [972102] |
| Debian | puma | source | bookworm | 4.3.6-1 | not yet assigned | Not reported | [972102] |
| Ubuntu | puma | deb | pro | 5.5.2-2ubuntu2+esm1 | Not reported | USN-6682-1 | Not reported |
| Opensuse | rubygem-puma | rpm | leap 15.2 | 4.3.5-lp152.4.3.1 | Not reported | OPENSUSE-SU-2020:1001-1 | Not reported |
| Ubuntu | puma | deb | pro | 3.12.4-1ubuntu2+esm1 | Not reported | UBUNTU-CVE-2020-11076 | Not reported |
| Suse | rubygem-puma | rpm | linux enterprise high availability extension 15 | 4.3.5-3.3.1 | Not reported | SUSE-SU-2020:1919-1 | Not reported |
| Suse | rubygem-puma | rpm | linux enterprise high availability extension 15 sp1 | 4.3.5-3.3.1 | Not reported | SUSE-SU-2020:1919-1 | Not reported |
| Suse | rubygem-puma | rpm | linux enterprise high availability extension 15 sp2 | 4.3.5-3.3.1 | Not reported | SUSE-SU-2020:1919-1 | Not reported |
| Opensuse | rubygem-puma | rpm | leap 15.1 | 4.3.5-lp151.3.3.1 | Not reported | OPENSUSE-SU-2020:0990-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [puma]Fixed
Details (2)
5.6.5-3+deb12u1· amd64 · bookwormFixed · Fixed:
4.3.6-1dsa · puma · debian · bookworm; dsa · puma · debian · 12
5.6.5-3+deb12u1· arm64 · bookwormFixed · Fixed:
4.3.6-1dsa · puma · debian · bookworm; dsa · puma · debian · 12
[Debian 13 (Trixie)]
- [puma]Fixed
Details (2)
6.6.0-4· amd64 · trixieFixed · Fixed:
4.3.6-1dsa · puma · debian · 13
6.6.0-4· arm64 · trixieFixed · Fixed:
4.3.6-1dsa · puma · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-ru-2020_2072-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2020-11076]
- [https://osv.dev/vulnerability/DLA-2398-1]
- [https://osv.dev/vulnerability/SUSE-SU-2020:1919-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2020-11076]
- [https://osv.dev/vulnerability/USN-6682-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2020:0990-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2020:1001-1]
- [https://security-tracker.debian.org/tracker/CVE-2020-11076]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]