{"cve":"CVE-2026-69215","nvd":{"published":"2026-09-15T20:17:40.950","modified":"2026-09-16T20:39:16.610","status":"Deferred","description":"Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The CookieJar client middleware uses unanchored substring checks instead of RFC 6265 domain and path matching when deciding whether to attach a stored cookie. A cookie for example.com can consequently be sent to an attacker-controlled hostname such as evilexample.com when an application using the same jar makes an attacker-influenced outbound request. This exposes session or authentication cookies and can enable hijacking of the application’s outbound sessions. This issue is fixed in versions 0.23.35 and 1.0.0-M47.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N","score":6.8},"cwes":["CWE-565","CWE-1275"],"references":["https://github.com/http4s/http4s/commit/c0a37f38d5ee2a568ba57bd9da62f8d79b8b1fcc","https://github.com/http4s/http4s/releases/tag/v0.23.35","https://github.com/http4s/http4s/releases/tag/v1.0.0-M47","https://github.com/http4s/http4s/security/advisories/GHSA-grh8-3p95-f9rr"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:54:41.405518556+00:00"},"epss":{"cve":"CVE-2026-69215","score":0.00505,"percentile":0.43143,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-grh8-3p95-f9rr","url":"https://osv.dev/vulnerability/GHSA-grh8-3p95-f9rr","summary":"Http4s: CookieJar middleware matches by substring, leaking cookies cross-origin","modified":"2026-09-15T20:15:05.150008402Z","packages":[{"ecosystem":"Maven","name":"org.http4s:http4s-client_2.12","purl":"pkg:maven/org.http4s/http4s-client_2.12","ranges":["<0.23.35"],"fixed":["0.23.35"]},{"ecosystem":"Maven","name":"org.http4s:http4s-client_2.13","purl":"pkg:maven/org.http4s/http4s-client_2.13","ranges":["<0.23.35"],"fixed":["0.23.35"]},{"ecosystem":"Maven","name":"org.http4s:http4s-client_3","purl":"pkg:maven/org.http4s/http4s-client_3","ranges":["<0.23.35"],"fixed":["0.23.35"]},{"ecosystem":"Maven","name":"org.http4s:http4s-client_2.13","purl":"pkg:maven/org.http4s/http4s-client_2.13","ranges":[">=1.0.0-M1 <1.0.0-M47"],"fixed":["1.0.0-M47"]},{"ecosystem":"Maven","name":"org.http4s:http4s-client_3","purl":"pkg:maven/org.http4s/http4s-client_3","ranges":[">=1.0.0-M1 <1.0.0-M47"],"fixed":["1.0.0-M47"]}]}],"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."]}