{"schemaVersion":3,"id":"CVE-2019-19389","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"JetBrains Ktor framework before version 1.2.6 was vulnerable to HTTP Response Splitting.","dates":{"published":"2019-12-26T20:15:55.000Z","modified":"2024-08-05T02:16:47.067Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.4,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.4,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":3.5,"severity":"low","vector":"AV:N/AC:M/Au:S/C:N/I:P/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.0083,"percentile":0.56871,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.0083},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0083,"percentile":0.56871}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0083,"percentile":0.56871}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"GITHUB_JLLEITSCHUH_6792947ED57D589B08C1CC8B666C7737","name":"6792947Ed57D589B08C1Cc8B666C7737","source":"github","url":"https://gist.github.com/JLLeitschuh/6792947ed57d589b08c1cc8b666c7737","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"REF_2D5377269A226C2F","name":"Exploit Reference (twitter.com)","source":"reference","url":"https://twitter.com/JLLeitschuh/status/1210256191110230017?s=20","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":2,"weaknesses":[{"id":"CWE-74","name":"Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')","description":"The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/74.html"}],"affected":[{"vendor":"jetbrains","product":"ktor","name":"ktor","label":"ktor","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.2.6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.2.6","eol":null,"hubHref":"/vendor/jetbrains/ktor"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/ktorio/ktor/pull/1408","label":"github.com/ktorio/ktor/pull/1408","hostname":"github.com","tags":["X Refsource MISC","Mitigation","Patch","Third Party Advisory"]},{"url":"https://gist.github.com/JLLeitschuh/6792947ed57d589b08c1cc8b666c7737","label":"gist.github.com/JLLeitschuh/6792947ed57d589b08c1cc8b666c7737","hostname":"gist.github.com","tags":["X Refsource MISC","Exploit","Third Party Advisory"]},{"url":"https://twitter.com/JLLeitschuh/status/1210256191110230017?s=20","label":"twitter.com/JLLeitschuh/status/1210256191110230017?s=20","hostname":"twitter.com","tags":["X Refsource MISC","Exploit","Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2019-12-26T20:15:55.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-05T02:16:47.067Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":32,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T09:05:31.194Z","stale":false,"partial":false}}