{"cve":"CVE-2026-0865","nvd":{"published":"2026-01-20T22:15:52.800","modified":"2026-06-17T10:11:31.550","status":"Deferred","description":"User-controlled header names and values containing newlines can allow injecting HTTP headers.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","score":5.9},"cvss_v3":null,"cwes":["CWE-74"],"references":["https://github.com/python/cpython/commit/22e4d55285cee52bc4dbe061324e5f30bd4dee58","https://github.com/python/cpython/commit/23e3c0ae867cca0130e441e776c9955b9027c510","https://github.com/python/cpython/commit/286e3ac39984fe85a17f4ab39c64d382137aae5f","https://github.com/python/cpython/commit/2f840249550e082dc351743f474ba56da10478d2","https://github.com/python/cpython/commit/4802b96a2cde58570c24c13ef3289490980961c5"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:21:16.563232421+00:00"},"epss":{"cve":"CVE-2026-0865","score":0.00554,"percentile":0.46293,"date":"2026-10-31"},"kev":null,"osv":[],"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."]}