{"cve":"CVE-2020-7695","nvd":{"published":"2020-07-27T12:15:11.993","modified":"2026-06-17T03:25:16.863","status":"Modified","description":"Uvicorn before 0.11.7 is vulnerable to HTTP response splitting. CRLF sequences are not escaped in the value of HTTP headers. Attackers can exploit this to add arbitrary headers to HTTP responses, or even return an arbitrary response body, whenever crafted input is used to construct HTTP headers.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3},"cwes":["CWE-74"],"references":["https://github.com/encode/uvicorn","https://snyk.io/vuln/SNYK-PYTHON-UVICORN-570471","https://github.com/encode/uvicorn","https://snyk.io/vuln/SNYK-PYTHON-UVICORN-570471"],"products":["encode:uvicorn"],"source":"nvd","synced_at":"2026-10-19T21:06:22.076270124+00:00"},"epss":{"cve":"CVE-2020-7695","score":0.01386,"percentile":0.72243,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-f97h-2pfx-f59f","url":"https://osv.dev/vulnerability/GHSA-f97h-2pfx-f59f","summary":"HTTP response splitting in uvicorn","modified":"2024-11-18T22:36:16.950355Z","packages":[{"ecosystem":"PyPI","name":"uvicorn","purl":"pkg:pypi/uvicorn","ranges":["<0.11.7"],"fixed":["0.11.7"]}]},{"id":"PYSEC-2020-151","url":"https://osv.dev/vulnerability/PYSEC-2020-151","summary":"","modified":"2023-11-08T04:04:05.317553Z","packages":[{"ecosystem":"PyPI","name":"uvicorn","purl":"pkg:pypi/uvicorn","ranges":["<0.11.7"],"fixed":["0.11.7"]}]}],"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."]}