CVE catalog
CVE-2023-40175
puma: CVE-2023-40175
- Severity
- High · CVSS 7.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.85% · Oct 25, 2026
Puma is a Ruby/Rack web server built for parallelism. Prior to versions 6.3.1 and 5.6.7, puma exhibited incorrect behavior when parsing chunked transfer encoding bodies and zero-length Content-Length headers in a way that allowed HTTP request smuggling. Severity of this issue is highly dependent on the nature of the web site using puma is. This could be caused by either incorrect parsing of trailing fields in chunked transfer encoding bodies or by parsing of blank/zero-length Content-Length headers. Both issues have been addressed and this vulnerability has been fixed in versions 6.3.1 and 5.6.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.
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 |
| Suse | rubygem-puma | linux enterprise high availability extension 15 sp6 | 5.6.9-150600.18.3.1 | fixed |
| Suse | rubygem-puma | linux enterprise high availability extension 15 sp7 | 5.6.9-150600.18.3.1 | fixed |
| Opensuse | rubygem-puma | leap 15.6 | 5.6.9-150600.18.3.1 | fixed |
| Suse | rubygem-puma | linux enterprise high availability extension 15 sp3 | 5.6.9-150000.3.18.1 | fixed |
| Suse | rubygem-puma | linux enterprise high availability extension 15 sp4 | 5.6.9-150000.3.18.1 | fixed |
| Suse | rubygem-puma | linux enterprise high availability extension 15 sp5 | 5.6.9-150000.3.18.1 | fixed |
| Suse | rubygem-puma | linux enterprise high availability extension 15 sp1 | 4.3.12-150000.3.12.1 | fixed |
| Suse | rubygem-puma | linux enterprise high availability extension 15 sp2 | 4.3.12-150000.3.12.1 | fixed |
| Suse | rubygem-puma | linux enterprise high availability extension 15 sp3 | 4.3.12-150000.3.12.1 | fixed |
| Suse | rubygem-puma | linux enterprise high availability extension 15 sp4 | 4.3.12-150000.3.12.1 | fixed |
| Suse | rubygem-puma | linux enterprise high availability extension 15 sp5 | 4.3.12-150000.3.12.1 | fixed |
| Opensuse | rubygem-puma | leap 15.4 | 4.3.12-150000.3.12.1 | fixed |
| Opensuse | rubygem-puma | leap 15.5 | 4.3.12-150000.3.12.1 | 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 |
| Ubuntu | puma | 24.04 | 5.6.5-4ubuntu2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | puma | source | sid | 5.6.7-1 | not yet assigned | Not reported | [1050079] |
| Debian | puma | source | forky | 5.6.7-1 | not yet assigned | Not reported | [1050079] |
| Debian | puma | source | trixie | 5.6.7-1 | not yet assigned | Not reported | [1050079] |
| Debian | puma | source | bookworm | 5.6.5-3+deb12u1 | not yet assigned | Not reported | [1050079] |
| Suse | rubygem-puma | rpm | linux enterprise high availability extension 15 sp6 | 5.6.9-150600.18.3.1 | Not reported | SUSE-SU-2025:03467-1 | Not reported |
| Suse | rubygem-puma | rpm | linux enterprise high availability extension 15 sp7 | 5.6.9-150600.18.3.1 | Not reported | SUSE-SU-2025:03467-1 | Not reported |
| Opensuse | rubygem-puma | rpm | leap 15.6 | 5.6.9-150600.18.3.1 | Not reported | SUSE-SU-2025:03467-1 | Not reported |
| Suse | rubygem-puma | rpm | linux enterprise high availability extension 15 sp3 | 5.6.9-150000.3.18.1 | Not reported | SUSE-SU-2025:03466-1 | Not reported |
| Suse | rubygem-puma | rpm | linux enterprise high availability extension 15 sp4 | 5.6.9-150000.3.18.1 | Not reported | SUSE-SU-2025:03466-1 | Not reported |
| Suse | rubygem-puma | rpm | linux enterprise high availability extension 15 sp5 | 5.6.9-150000.3.18.1 | Not reported | SUSE-SU-2025:03466-1 | Not reported |
| Suse | rubygem-puma | rpm | linux enterprise high availability extension 15 sp1 | 4.3.12-150000.3.12.1 | Not reported | SUSE-SU-2023:3957-1 | Not reported |
| Suse | rubygem-puma | rpm | linux enterprise high availability extension 15 sp2 | 4.3.12-150000.3.12.1 | Not reported | SUSE-SU-2023:3957-1 | Not reported |
| Suse | rubygem-puma | rpm | linux enterprise high availability extension 15 sp3 | 4.3.12-150000.3.12.1 | Not reported | SUSE-SU-2023:3957-1 | Not reported |
| Suse | rubygem-puma | rpm | linux enterprise high availability extension 15 sp4 | 4.3.12-150000.3.12.1 | Not reported | SUSE-SU-2023:3957-1 | Not reported |
| Suse | rubygem-puma | rpm | linux enterprise high availability extension 15 sp5 | 4.3.12-150000.3.12.1 | Not reported | SUSE-SU-2023:3957-1 | Not reported |
| Opensuse | rubygem-puma | rpm | leap 15.4 | 4.3.12-150000.3.12.1 | Not reported | SUSE-SU-2023:3957-1 | Not reported |
| Opensuse | rubygem-puma | rpm | leap 15.5 | 4.3.12-150000.3.12.1 | Not reported | SUSE-SU-2023:3957-1 | Not reported |
| Ubuntu | puma | deb | pro | 5.5.2-2ubuntu2+esm1 | Not reported | UBUNTU-CVE-2023-40175 | Not reported |
| Ubuntu | puma | deb | 24.04 | 5.6.5-4ubuntu2 | Not reported | UBUNTU-CVE-2023-40175 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2023_3957-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2023-40175]
- [https://osv.dev/vulnerability/SUSE-SU-2023:3957-1]
- [https://osv.dev/vulnerability/SUSE-SU-2025:03466-1]
- [https://osv.dev/vulnerability/SUSE-SU-2025:03467-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2023-40175]
- [https://security-tracker.debian.org/tracker/CVE-2023-40175]
- [https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-40175.json]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]