{"cve":"CVE-2024-6827","nvd":{"published":"2025-03-20T10:15:33.357","modified":"2026-06-17T08:18:47.620","status":"Deferred","description":"Gunicorn version 21.2.0 does not properly validate the value of the 'Transfer-Encoding' header as specified in the RFC standards, which leads to the default fallback method of 'Content-Length,' making it vulnerable to TE.CL request smuggling. This vulnerability can lead to cache poisoning, data exposure, session manipulation, SSRF, XSS, DoS, data integrity compromise, security bypass, information leakage, and business logic abuse.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-444"],"references":["https://huntr.com/bounties/1b4f8f38-39da-44b6-9f98-f618639d0dd7"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:00:17.429720821+00:00"},"epss":{"cve":"CVE-2024-6827","score":0.00806,"percentile":0.56805,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-hc5x-x2vx-497g","url":"https://osv.dev/vulnerability/GHSA-hc5x-x2vx-497g","summary":"Gunicorn HTTP Request/Response Smuggling vulnerability","modified":"2026-09-10T03:49:48.430751503Z","packages":[{"ecosystem":"PyPI","name":"gunicorn","purl":"pkg:pypi/gunicorn","ranges":["<22.0.0"],"fixed":["22.0.0"]}]},{"id":"PYSEC-2026-1433","url":"https://osv.dev/vulnerability/PYSEC-2026-1433","summary":"Gunicorn HTTP Request/Response Smuggling vulnerability","modified":"2026-07-07T17:47:39.206895865Z","packages":[{"ecosystem":"PyPI","name":"gunicorn","purl":"pkg:pypi/gunicorn","ranges":["<22.0.0"],"fixed":["22.0.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}