CVE-2024-1135
HTTP Request Smuggling in benoitc/gunicorn
HIGH 7.5
At a glance
- Source
- NVD
- EPSS
- EPSS 3.00 % · percentile 87 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- @huntr_ai
- NVD status
- Deferred
Description
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.
Weaknesses (CWE)
- CWE-444 — Inconsistent Interpretation of HTTP Requests
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.0 | HIGH 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N | @huntr_ai |
| CVSS 3.0 | HIGH 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N | NVD · security@huntr.dev (Secondary) |
Advisories
- GHSA-w3h3-4rj7-4ph4 — Request smuggling leading to endpoint restriction bypass in Gunicorn
- PYSEC-2026-1434 — Request smuggling leading to endpoint restriction bypass in Gunicorn
European references
- ENISA EUVD · EUVD-2024-1316
- GCVE · GCVE-0-2024-1135
CERT-FR advisories
- CERTFR-2025-AVI-0627 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0233 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0128 — Multiples vulnérabilités dans les produits Palo Alto Networks · cert.ssi.gouv.fr
- CERTFR-2024-AVI-1030 — Multiples vulnérabilités dans IBM QRadar · cert.ssi.gouv.fr
- CERTFR-2024-AVI-1015 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0579 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0366 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| benoitc · benoitc/gunicorn | affected unspecified ≤ latest |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |