{"id":"CVE-2020-7622","aliases":["EUVD-2020-0381","GHSA-gv3v-92v6-m48j","SNYK-JAVA-IOJOOBY-564249"],"status":"published","title":"HTTP Response Splitting","description":"This affects the package io.jooby:jooby-netty before 1.6.9, from 2.0.0 and before 2.2.1. The DefaultHttpHeaders is set to false which means it does not validates that the header isn't being abused for HTTP Response Splitting.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01602,"percentile":0.75998,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-444"],"published":"2020-04-03T15:23:30Z","modified":"2026-10-20T14:05:21Z","fixes":[{"ecosystem":"Maven","package":"io.jooby:jooby-netty","fixed_in":["2.2.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"io.jooby:jooby-netty","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.1"}]}]},{"source":"osv","ecosystem":"Maven","package":"io.jooby:jooby-netty","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.1"}]}],"versions":["2.0.0","2.0.0.M1","2.0.0.M2","2.0.0.M3","2.0.0.RC1","2.0.0.RC2","2.0.0.RC3","2.0.1","2.0.2","2.0.3","2.0.4","2.0.5","2.0.6","2.1.0","2.2.0"]}],"products":[{"vendor":"jooby","product":"jooby"}],"references":[{"url":"https://snyk.io/vuln/SNYK-JAVA-IOJOOBY-564249","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/jooby-project/jooby/commit/b66e3342cf95205324023cfdf2cb5811e8a6dcf4","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/jooby-project/jooby/security/advisories/GHSA-gv3v-92v6-m48j","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-7622","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-gv3v-92v6-m48j"}],"sources":{"cve":[{"id":"CVE-2020-7622","title":"HTTP Response Splitting","description":"This affects the package io.jooby:jooby-netty before 1.6.9, from 2.0.0 and before 2.2.1. The DefaultHttpHeaders is set to false which means it does not validates that the header isn't being abused for HTTP Response Splitting.","status":"published","published":"2020-04-06T14:08:48.593Z","modified":"2024-09-16T17:03:41.455Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:35:58.331892Z"}],"euvd":[{"id":"EUVD-2020-0381","description":"This affects the package io.jooby:jooby-netty before 1.6.9, from 2.0.0 and before 2.2.1. The DefaultHttpHeaders is set to false which means it does not validates that the header isn't being abused for HTTP Response Splitting.","status":"published","published":"2020-04-06T14:08:48Z","modified":"2024-09-16T17:03:41Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T00:55:45.787721Z"}],"ghsa":[{"id":"GHSA-gv3v-92v6-m48j","title":"Improper Neutralization of CRLF Sequences in HTTP Headers in Jooby ('HTTP Response Splitting)","description":"### Impact\n\n - Cross Site Scripting\n - Cache Poisoning\n - Page Hijacking\n\n### Patches\n\nThis was fixed in version `2.2.1`.\n\n### Workarounds\n\nIf you are unable to update, ensure that user supplied data isn't able to flow to HTTP headers. If it does, pre-sanitize for CRLF characters.\n\n### References\n\n##### [CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting')](https://cwe.mitre.org/data/definitions/113.html)\n\nI've been poking at libraries to see if they are vulnerable to HTTP Response Splitting and Jooby is my third case of finding this vulnerability.\n\n### Root Cause\n\nThis roots cause back to this line in the Jooby codebase:\n\nhttps://github.com/jooby-project/jooby/blob/93cfc80aa20c188f71a442ea7a1827da380e1c27/modules/jooby-netty/src/main/java/io/jooby/internal/netty/NettyContext.java#L102\n\nThe `DefaultHttpHeaders` takes a parameter `validate` which, when `true` (as it is for the no-arg constructor) validates that the header isn't being abused to do HTTP Response Splitting.\n\n### Reported By\n\nThis vulnerability was reported by @JLLeitschuh ([Twitter](https://twitter.com/JLLeitschuh))\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [jooby-project/jooby](https://github.com/jooby-project/jooby/issues)","status":"published","published":"2020-04-03T15:23:30Z","modified":"2023-02-01T05:03:00Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T14:36:31.364752Z"}],"nvd":[{"id":"CVE-2020-7622","description":"This affects the package io.jooby:jooby-netty before 1.6.9, from 2.0.0 and before 2.2.1. The DefaultHttpHeaders is set to false which means it does not validates that the header isn't being abused for HTTP Response Splitting.","status":"published","published":"2020-04-06T15:15:12.77Z","modified":"2026-06-17T03:25:08.117Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:05:57.678762Z"}],"osv":[{"id":"CVE-2020-7622","description":"This affects the package io.jooby:jooby-netty before 1.6.9, from 2.0.0 and before 2.2.1. The DefaultHttpHeaders is set to false which means it does not validates that the header isn't being abused for HTTP Response Splitting.","status":"published","published":"2020-04-06T15:15:12.77Z","modified":"2026-10-20T14:05:21.037122542Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:17.34531Z"},{"id":"GHSA-gv3v-92v6-m48j","title":"Improper Neutralization of CRLF Sequences in HTTP Headers in Jooby ('HTTP Response Splitting)","description":"### Impact\n\n - Cross Site Scripting\n - Cache Poisoning\n - Page Hijacking\n\n### Patches\n\nThis was fixed in version `2.2.1`.\n\n### Workarounds\n\nIf you are unable to update, ensure that user supplied data isn't able to flow to HTTP headers. If it does, pre-sanitize for CRLF characters.\n\n### References\n\n##### [CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting')](https://cwe.mitre.org/data/definitions/113.html)\n\nI've been poking at libraries to see if they are vulnerable to HTTP Response Splitting and Jooby is my third case of finding this vulnerability.\n\n### Root Cause\n\nThis roots cause back to this line in the Jooby codebase:\n\nhttps://github.com/jooby-project/jooby/blob/93cfc80aa20c188f71a442ea7a1827da380e1c27/modules/jooby-netty/src/main/java/io/jooby/internal/netty/NettyContext.java#L102\n\nThe `DefaultHttpHeaders` takes a parameter `validate` which, when `true` (as it is for the no-arg constructor) validates that the header isn't being abused to do HTTP Response Splitting.\n\n### Reported By\n\nThis vulnerability was reported by @JLLeitschuh ([Twitter](https://twitter.com/JLLeitschuh))\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [jooby-project/jooby](https://github.com/jooby-project/jooby/issues)","status":"published","published":"2020-04-03T15:23:30Z","modified":"2026-09-10T03:48:43.965378365Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T15:46:48.191583Z"}]}}