CVE catalog
CVE-2024-1135
gunicorn: CVE-2024-1135
- Severity
- High · CVSS 7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 3.00% · Oct 25, 2026
Gunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling (HRS) vulnerabilities. By crafting requests with conflicting Transfer-Encoding headers, attackers can bypass security restrictions and access restricted endpoints. This issue is due to Gunicorn's handling of Transfer-Encoding headers, where it incorrectly processes requests with multiple, conflicting Transfer-Encoding headers, treating them as chunked regardless of the final encoding specified. This vulnerability allows for a range of attacks including cache poisoning, session manipulation, and data exposure.
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 | gunicorn | sid | 26.2.2-2 | fixed |
| Debian | gunicorn | forky | 26.2.2-2 | fixed |
| Debian | gunicorn | trixie | 23.0.0-1 | fixed |
| Debian | gunicorn | bookworm | 20.1.0-6+deb12u1 | fixed |
| Suse | python-gunicorn | linux enterprise module for python 3 15 sp5 | 20.1.0-150400.12.6.1 | fixed |
| Suse | python-gunicorn | linux enterprise high performance computing 15 sp4-espos | 20.1.0-150400.12.6.1 | fixed |
| Suse | python-gunicorn | linux enterprise high performance computing 15 sp4-ltss | 20.1.0-150400.12.6.1 | fixed |
| Suse | python-gunicorn | linux enterprise server 15 sp4-ltss | 20.1.0-150400.12.6.1 | fixed |
| Suse | python-gunicorn | linux enterprise server for sap applications 15 sp4 | 20.1.0-150400.12.6.1 | fixed |
| Opensuse | python-gunicorn | leap 15.5 | 20.1.0-150400.12.6.1 | fixed |
| Suse | python-gunicorn | linux enterprise module for public cloud 15 sp2 | 19.7.1-150000.3.7.1 | fixed |
| Suse | python-gunicorn | linux enterprise module for public cloud 15 sp3 | 19.7.1-150000.3.7.1 | fixed |
| Suse | python-gunicorn | linux enterprise module for public cloud 15 sp4 | 19.7.1-150000.3.7.1 | fixed |
| Suse | python-gunicorn | linux enterprise module for public cloud 15 sp5 | 19.7.1-150000.3.7.1 | fixed |
| Suse | python-gunicorn | linux enterprise module for public cloud 15 sp6 | 19.7.1-150000.3.7.1 | fixed |
| Opensuse | python-gunicorn | leap 15.5 | 19.7.1-150000.3.7.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | gunicorn | source | sid | 22.0.0-1 | not yet assigned | Not reported | [1069126] |
| Debian | gunicorn | source | forky | 22.0.0-1 | not yet assigned | Not reported | [1069126] |
| Debian | gunicorn | source | trixie | 22.0.0-1 | not yet assigned | Not reported | [1069126] |
| Debian | gunicorn | source | bookworm | 20.1.0-6+deb12u1 | not yet assigned | Not reported | [1069126] |
| Suse | python-gunicorn | rpm | linux enterprise module for python 3 15 sp5 | 20.1.0-150400.12.6.1 | Not reported | SUSE-SU-2024:1440-1 | Not reported |
| Suse | python-gunicorn | rpm | linux enterprise high performance computing 15 sp4-espos | 20.1.0-150400.12.6.1 | Not reported | SUSE-SU-2024:1440-1 | Not reported |
| Suse | python-gunicorn | rpm | linux enterprise high performance computing 15 sp4-ltss | 20.1.0-150400.12.6.1 | Not reported | SUSE-SU-2024:1440-1 | Not reported |
| Suse | python-gunicorn | rpm | linux enterprise server 15 sp4-ltss | 20.1.0-150400.12.6.1 | Not reported | SUSE-SU-2024:1440-1 | Not reported |
| Suse | python-gunicorn | rpm | linux enterprise server for sap applications 15 sp4 | 20.1.0-150400.12.6.1 | Not reported | SUSE-SU-2024:1440-1 | Not reported |
| Opensuse | python-gunicorn | rpm | leap 15.5 | 20.1.0-150400.12.6.1 | Not reported | SUSE-SU-2024:1440-1 | Not reported |
| Suse | python-gunicorn | rpm | linux enterprise module for public cloud 15 sp2 | 19.7.1-150000.3.7.1 | Not reported | SUSE-SU-2024:2881-1 | Not reported |
| Suse | python-gunicorn | rpm | linux enterprise module for public cloud 15 sp3 | 19.7.1-150000.3.7.1 | Not reported | SUSE-SU-2024:2881-1 | Not reported |
| Suse | python-gunicorn | rpm | linux enterprise module for public cloud 15 sp4 | 19.7.1-150000.3.7.1 | Not reported | SUSE-SU-2024:2881-1 | Not reported |
| Suse | python-gunicorn | rpm | linux enterprise module for public cloud 15 sp5 | 19.7.1-150000.3.7.1 | Not reported | SUSE-SU-2024:2881-1 | Not reported |
| Suse | python-gunicorn | rpm | linux enterprise module for public cloud 15 sp6 | 19.7.1-150000.3.7.1 | Not reported | SUSE-SU-2024:2881-1 | Not reported |
| Opensuse | python-gunicorn | rpm | leap 15.5 | 19.7.1-150000.3.7.1 | Not reported | SUSE-SU-2024:2881-1 | 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-2024_1440-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2024-1135]
- [https://osv.dev/vulnerability/DLA-3851-1]
- [https://osv.dev/vulnerability/DLA-3996-1]
- [https://osv.dev/vulnerability/SUSE-SU-2024:1440-1]
- [https://osv.dev/vulnerability/SUSE-SU-2024:2881-1]
- [https://security-tracker.debian.org/tracker/CVE-2024-1135]
- [https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-1135.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2024/wid-sec-w-2024-1228.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]