{"schema_version":1,"title":"Http4s vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 6 vulnerabilities in Http4s: 0 in the last 7 days and 6 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-69217, was published on 15 September 2026.","url":"https://junglewise.ai/threats/technologies/http4s","json_url":"https://junglewise.ai/threats/technologies/http4s.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/http4s","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":2,"all_time":6,"critical":0,"exploited":0,"last_7_days":0,"last_30_days":6,"last_90_days":6,"last_365_days":6},"latest":[{"cve":"CVE-2026-69217","cvss":8.7,"epss":0.005,"slug":"cve-2026-69217-http4s-ember-http-1-1-parser-request-smuggling-via-duplicate","title":"Http4s Ember HTTP/1.1 parser request smuggling via duplicate Content-Length","severity":"high","exploited":false,"published_at":"2026-09-15T20:17:41.12+00:00","url":"https://junglewise.ai/threats/cve-2026-69217-http4s-ember-http-1-1-parser-request-smuggling-via-duplicate"},{"cve":"CVE-2026-69210","cvss":7.5,"epss":0.0063,"slug":"cve-2026-69210-http4s-websocket-decoder-negative-length-handling-denial-of","title":"Http4s WebSocket decoder negative length handling denial of service","severity":"high","exploited":false,"published_at":"2026-09-15T20:17:40.32+00:00","url":"https://junglewise.ai/threats/cve-2026-69210-http4s-websocket-decoder-negative-length-handling-denial-of"},{"cve":"CVE-2026-69206","cvss":5.9,"epss":0.004,"slug":"cve-2026-69206-http4s-digestauth-replay-attack-in-authorization-header","title":"Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, DigestAuth replay protection records lastNc plus one instead","severity":"medium","exploited":false,"published_at":"2026-09-15T20:17:40.18+00:00","url":"https://junglewise.ai/threats/cve-2026-69206-http4s-digestauth-replay-attack-in-authorization-header"},{"cve":"CVE-2026-69212","cvss":5.9,"epss":0.0028,"slug":"cve-2026-69212-http4s-followredirect-credential-leak-on-scheme-downgrade","title":"Http4s FollowRedirect credential leak on scheme downgrade","severity":"medium","exploited":false,"published_at":"2026-09-15T19:17:38.167+00:00","url":"https://junglewise.ai/threats/cve-2026-69212-http4s-followredirect-credential-leak-on-scheme-downgrade"},{"cve":"CVE-2026-69211","cvss":4.8,"epss":0.0033,"slug":"cve-2026-69211-http4s-responsecookie-header-injection-via-unescaped-attributes","title":"Http4s ResponseCookie header injection via unescaped attributes","severity":"medium","exploited":false,"published_at":"2026-09-15T19:17:38.017+00:00","url":"https://junglewise.ai/threats/cve-2026-69211-http4s-responsecookie-header-injection-via-unescaped-attributes"},{"cve":"CVE-2026-69201","cvss":5.9,"epss":0.0076,"slug":"cve-2026-69201-http4s-resourceservice-and-webjarservice-path-traversal-via","title":"Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, ResourceService and WebjarService decode each URL path segmen","severity":"medium","exploited":false,"published_at":"2026-09-15T19:17:37.423+00:00","url":"https://junglewise.ai/threats/cve-2026-69201-http4s-resourceservice-and-webjarservice-path-traversal-via"}],"weekly":[{"week":"2026-06-29","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":6},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0}],"related":[{"name":"Http4s-Ember-Core","slug":"http4s-ember-core","vulnerabilities":10,"url":"https://junglewise.ai/threats/technologies/http4s-ember-core"},{"name":"Http4s Blaze-Server","slug":"blaze-server","vulnerabilities":3,"url":"https://junglewise.ai/threats/technologies/blaze-server"}],"technology":{"hub":true,"name":"Http4s","slug":"http4s","vendor":{"name":"Http4s","slug":"http4s","url":"https://junglewise.ai/threats/vendors/http4s"},"aliases":[],"category":"library","homepage":"https://http4s.org/","repo_url":"https://github.com/http4s/http4s","description":"A typeful, functional, streaming HTTP engine for Scala.","url":"https://junglewise.ai/threats/technologies/http4s"},"most_severe":[{"cve":"CVE-2026-69217","cvss":8.7,"epss":0.005,"slug":"cve-2026-69217-http4s-ember-http-1-1-parser-request-smuggling-via-duplicate","title":"Http4s Ember HTTP/1.1 parser request smuggling via duplicate Content-Length","severity":"high","exploited":false,"published_at":"2026-09-15T20:17:41.12+00:00","url":"https://junglewise.ai/threats/cve-2026-69217-http4s-ember-http-1-1-parser-request-smuggling-via-duplicate"},{"cve":"CVE-2026-69210","cvss":7.5,"epss":0.0063,"slug":"cve-2026-69210-http4s-websocket-decoder-negative-length-handling-denial-of","title":"Http4s WebSocket decoder negative length handling denial of service","severity":"high","exploited":false,"published_at":"2026-09-15T20:17:40.32+00:00","url":"https://junglewise.ai/threats/cve-2026-69210-http4s-websocket-decoder-negative-length-handling-denial-of"},{"cve":"CVE-2026-69201","cvss":5.9,"epss":0.0076,"slug":"cve-2026-69201-http4s-resourceservice-and-webjarservice-path-traversal-via","title":"Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, ResourceService and WebjarService decode each URL path segmen","severity":"medium","exploited":false,"published_at":"2026-09-15T19:17:37.423+00:00","url":"https://junglewise.ai/threats/cve-2026-69201-http4s-resourceservice-and-webjarservice-path-traversal-via"},{"cve":"CVE-2026-69206","cvss":5.9,"epss":0.004,"slug":"cve-2026-69206-http4s-digestauth-replay-attack-in-authorization-header","title":"Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, DigestAuth replay protection records lastNc plus one instead","severity":"medium","exploited":false,"published_at":"2026-09-15T20:17:40.18+00:00","url":"https://junglewise.ai/threats/cve-2026-69206-http4s-digestauth-replay-attack-in-authorization-header"},{"cve":"CVE-2026-69212","cvss":5.9,"epss":0.0028,"slug":"cve-2026-69212-http4s-followredirect-credential-leak-on-scheme-downgrade","title":"Http4s FollowRedirect credential leak on scheme downgrade","severity":"medium","exploited":false,"published_at":"2026-09-15T19:17:38.167+00:00","url":"https://junglewise.ai/threats/cve-2026-69212-http4s-followredirect-credential-leak-on-scheme-downgrade"},{"cve":"CVE-2026-69211","cvss":4.8,"epss":0.0033,"slug":"cve-2026-69211-http4s-responsecookie-header-injection-via-unescaped-attributes","title":"Http4s ResponseCookie header injection via unescaped attributes","severity":"medium","exploited":false,"published_at":"2026-09-15T19:17:38.017+00:00","url":"https://junglewise.ai/threats/cve-2026-69211-http4s-responsecookie-header-injection-via-unescaped-attributes"}],"generated_at":"2026-09-26T09:11:00.170868+00:00"}