{"id":"CVE-2020-36049","aliases":["AZL-45030","CLSA-2026-1772496675","CLSA-2026-1776731787","CLSA-2026-1791899634","CLSA-2026-1792599106","CLSA-2026-1792665531","DEBIAN-CVE-2020-36049","EUVD-2021-1424","GHSA-xfhh-g9f5-x4m4","UBUNTU-CVE-2020-36049"],"status":"published","title":"Resource exhaustion in socket.io-parser","description":"socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.02671,"percentile":0.85864,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400","CWE-770"],"published":"2021-01-07T23:24:23Z","modified":"2026-11-05T05:36:30Z","fixes":[{"ecosystem":"npm","package":"socket.io-parser","fixed_in":["3.3.2","3.4.1"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:12","package":"node-socket.io-parser","fixed_in":["3.4.1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"node-socket.io-parser","fixed_in":["3.4.1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"node-socket.io-parser","fixed_in":["3.4.1-1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.2"}]}]},{"source":"ghsa","ecosystem":"npm","package":"socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4.0"},{"last_affected":"3.4.0"},{"fixed":"3.4.1"}]}],"versions":["3.4.0"]},{"source":"osv","ecosystem":"Azure Linux:3","package":"js-jquery","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"3.5.0-4"}]}]},{"source":"osv","ecosystem":"TuxCare:npm","package":"socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.2.0-tuxcare.0"},{"fixed":"3.2.0-tuxcare.1"}]}],"versions":["3.2.0"],"bundled":3},{"source":"osv","ecosystem":"TuxCare:npm","package":"socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.1.3-tuxcare.0"},{"fixed":"3.1.3-tuxcare.1"}]}],"versions":["3.1.3"],"bundled":3},{"source":"osv","ecosystem":"TuxCare:npm","package":"socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.3.1-tuxcare.0"},{"fixed":"2.3.1-tuxcare.1"}]}],"versions":["2.3.1"],"bundled":5},{"source":"osv","ecosystem":"TuxCare:npm","package":"socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.2.2-tuxcare.0"},{"fixed":"2.2.2-tuxcare.1"}]}],"versions":["2.2.2"],"bundled":5},{"source":"osv","ecosystem":"TuxCare:npm","package":"socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.2.4-tuxcare.0"},{"fixed":"2.2.4-tuxcare.1"}]}],"versions":["2.2.4"],"bundled":5},{"source":"osv","ecosystem":"Debian:12","package":"node-socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"node-socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"node-socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.1-1"}]}]},{"source":"osv","ecosystem":"npm","package":"socket.io-parser","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.3.2"}]}]},{"source":"osv","ecosystem":"npm","package":"socket.io-parser","ranges":[{"type":"SEMVER","events":[{"introduced":"3.4.0"},{"fixed":"3.4.1"}]}],"versions":["3.4.0"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"node-socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.1-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"node-socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.0-1","3.4.0-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"node-socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.0.2-1","4.1.1+~3.0.0-1","4.1.2+~3.0.0-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"node-socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.1+~3.1.0-3"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"node-socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.1+~3.1.0-3"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"node-socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.1+~3.1.0-4","4.2.4+~3.1.2-1","4.2.4+~3.1.2-2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"node-socket.io-parser","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.1+~3.1.0-3","4.2.1+~3.1.0-4"]}],"products":[{"vendor":"socket","product":"socket.io-parser"}],"references":[{"url":"https://blog.caller.xyz/socketio-engineio-dos/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","report"]},{"url":"https://github.com/bcaller/kill-engine-io","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","web","report"]},{"url":"https://github.com/socketio/socket.io-parser/commit/dcb942d24db97162ad16a67c2a0cf30875342d55","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-36049","tags":["web","advisory"]},{"url":"https://github.com/socketio/socket.io-parser/releases/tag/3.3.2","tags":["web"]},{"url":"https://github.com/socketio/socket.io-parser/releases/tag/3.4.1","tags":["web"]},{"url":"https://www.npmjs.com/package/socket.io-parser","tags":["web"]},{"url":"https://github.com/advisories/GHSA-xfhh-g9f5-x4m4"},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-36049","tags":["advisory"]},{"url":"https://blog.caller.xyz/socketio-engineio-dos","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2020-36049","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-36049","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-36049","description":"socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.","status":"published","published":"2021-01-07T23:24:23Z","modified":"2024-08-04T17:16:14.004Z","updated_at":"2026-11-02T14:35:55.128961Z"}],"euvd":[{"id":"EUVD-2021-1424","description":"socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.","status":"published","published":"2021-01-07T23:24:23Z","modified":"2024-08-04T17:16:14Z","updated_at":"2026-11-03T03:07:04.065361Z"}],"ghsa":[{"id":"GHSA-xfhh-g9f5-x4m4","title":"Resource exhaustion in socket.io-parser","description":"The `socket.io-parser` npm package before versions 3.3.2 and 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.","status":"published","published":"2021-06-30T16:51:31Z","modified":"2023-02-01T05:05:24Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:36:34.260786Z"}],"nvd":[{"id":"CVE-2020-36049","description":"socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.","status":"published","published":"2021-01-08T00:15:11.187Z","modified":"2026-06-17T03:14:44.86Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:06:28.892872Z"}],"osv":[{"id":"AZL-45030","title":"CVE-2020-36049 affecting package js-jquery 3.5.0-4","description":"socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.","status":"published","published":"2021-01-08T00:15:11Z","modified":"2026-11-05T05:36:30Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-05T16:41:20.321068Z"},{"id":"CVE-2020-36049","description":"socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.","status":"published","published":"2021-01-08T00:15:11.187Z","modified":"2026-10-24T10:48:38.072746724Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:16.612899Z"},{"id":"DEBIAN-CVE-2020-36049","description":"socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.","status":"published","published":"2021-01-08T00:15:11.187Z","modified":"2026-10-26T12:02:01.515235483Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:34.019707Z"},{"id":"GHSA-xfhh-g9f5-x4m4","title":"Resource exhaustion in socket.io-parser","description":"The `socket.io-parser` npm package before versions 3.3.2 and 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.","status":"published","published":"2021-06-30T16:51:31Z","modified":"2023-11-08T04:03:40.136588Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:46:59.835583Z"},{"id":"UBUNTU-CVE-2020-36049","description":"socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.","status":"published","published":"2021-01-08T00:15:00Z","modified":"2026-10-17T12:55:53.036937361Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:25.179924Z"},{"id":"CLSA-2026-1772496675","title":"TuxCare security update for socket.io-parser (3 CVEs)","description":"TuxCare rebuilt socket.io-parser to address 3 CVEs. Fixed in 3.2.0-tuxcare.1.","status":"published","published":"2026-08-04T14:52:08Z","modified":"2026-10-15T09:47:46.249288204Z","updated_at":"2026-11-02T15:43:43.249928Z"},{"id":"CLSA-2026-1776731787","title":"TuxCare security update for socket.io-parser (3 CVEs)","description":"TuxCare rebuilt socket.io-parser to address 3 CVEs. Fixed in 3.1.3-tuxcare.1.","status":"published","published":"2026-08-04T14:52:27Z","modified":"2026-10-25T01:43:09.398850678Z","updated_at":"2026-11-02T15:43:44.009773Z"},{"id":"CLSA-2026-1791899634","title":"TuxCare security update for socket.io-parser (5 CVEs)","description":"TuxCare rebuilt socket.io-parser to address 5 CVEs. Fixed in 2.3.1-tuxcare.1.","status":"published","published":"2026-10-13T13:53:54Z","modified":"2026-10-15T09:47:53.469310802Z","updated_at":"2026-11-02T15:43:50.599064Z"},{"id":"CLSA-2026-1792599106","title":"TuxCare security update for socket.io-parser (5 CVEs)","description":"TuxCare rebuilt socket.io-parser to address 5 CVEs. Fixed in 2.2.2-tuxcare.1.","status":"published","published":"2026-10-21T16:11:46Z","modified":"2026-10-21T20:30:50.501354765Z","updated_at":"2026-11-02T15:43:54.672859Z"},{"id":"CLSA-2026-1792665531","title":"TuxCare security update for socket.io-parser (5 CVEs)","description":"TuxCare rebuilt socket.io-parser to address 5 CVEs. Fixed in 2.2.4-tuxcare.1.","status":"published","published":"2026-10-22T10:38:51Z","modified":"2026-10-22T14:15:04.657404145Z","updated_at":"2026-11-02T15:43:54.981307Z"}]}}