{"id":"CVE-2021-40110","aliases":["EUVD-2022-0682","GHSA-r58x-wjg8-63m9"],"status":"published","title":"Apache James IMAP vulnerable to a ReDoS","description":"In Apache James, using Jazzer fuzzer, we identified that an IMAP user can craft IMAP LIST commands to orchestrate a Denial Of Service using a vulnerable Regular expression. This affected Apache James prior to 3.6.1 We recommend upgrading to Apache James 3.6.1 or higher , which enforce the use of RE2J regular expression engine to execute regex in linear time without back-tracking.","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":"2026-11-11","score":0.02954,"percentile":0.87359,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2022-01-04T08:55:22Z","modified":"2026-10-24T10:31:03Z","fixes":[{"ecosystem":"Maven","package":"org.apache.james:james-server","fixed_in":["3.6.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"org.apache.james:james-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.1.0"},{"fixed":"3.6.1"}]}]},{"source":"osv","ecosystem":"Maven","package":"org.apache.james:james-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.1.0"},{"fixed":"3.6.1"}]}],"versions":["3.1.0","3.2.0","3.3.0","3.4.0","3.5.0","3.6.0"]}],"products":[{"vendor":"apache","product":"james"},{"vendor":"apache software foundation","product":"apache james"}],"references":[{"url":"https://www.openwall.com/lists/oss-security/2022/01/04/2","tags":["x_refsource_MISC","x_transferred","Mailing List","Third Party Advisory","advisory","web"]},{"url":"http://www.openwall.com/lists/oss-security/2022/01/04/2","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-40110","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-r58x-wjg8-63m9"}],"sources":{"cve":[{"id":"CVE-2021-40110","title":"Apache James IMAP vulnerable to a ReDoS","description":"In Apache James, using Jazzer fuzzer, we identified that an IMAP user can craft IMAP LIST commands to orchestrate a Denial Of Service using a vulnerable Regular expression. This affected Apache James prior to 3.6.1 We recommend upgrading to Apache James 3.6.1 or higher , which enforce the use of RE2J regular expression engine to execute regex in linear time without back-tracking.","status":"published","published":"2022-01-04T08:55:22Z","modified":"2024-08-04T02:27:31.846Z","updated_at":"2026-11-02T14:33:01.852999Z"}],"euvd":[{"id":"EUVD-2022-0682","description":"In Apache James, using Jazzer fuzzer, we identified that an IMAP user can craft IMAP LIST commands to orchestrate a Denial Of Service using a vulnerable Regular expression. This affected Apache James prior to 3.6.1 We recommend upgrading to Apache James 3.6.1 or higher , which enforce the use of RE2J regular expression engine to execute regex in linear time without back-tracking.","status":"published","published":"2022-01-04T08:55:22Z","modified":"2024-08-04T02:27:31Z","updated_at":"2026-11-03T03:24:20.862157Z"}],"ghsa":[{"id":"GHSA-r58x-wjg8-63m9","title":"Denial of Service in Apache James","description":"In Apache James, using Jazzer fuzzer, we identified that an IMAP user can craft IMAP LIST commands to orchestrate a Denial Of Service using a vulnerable Regular expression. This affected Apache James prior to 3.6.1 We recommend upgrading to Apache James 3.6.1 or higher , which enforce the use of RE2J regular expression engine to execute regex in linear time without back-tracking.","status":"published","published":"2022-01-08T00:40:30Z","modified":"2024-05-15T06:30:05Z","updated_at":"2026-11-02T14:37:49.48194Z"}],"nvd":[{"id":"CVE-2021-40110","description":"In Apache James, using Jazzer fuzzer, we identified that an IMAP user can craft IMAP LIST commands to orchestrate a Denial Of Service using a vulnerable Regular expression. This affected Apache James prior to 3.6.1 We recommend upgrading to Apache James 3.6.1 or higher , which enforce the use of RE2J regular expression engine to execute regex in linear time without back-tracking.","status":"published","published":"2022-01-04T09:15:07.327Z","modified":"2026-06-17T04:06:32.313Z","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"}],"updated_at":"2026-11-02T14:07:03.418194Z"}],"osv":[{"id":"CVE-2021-40110","description":"In Apache James, using Jazzer fuzzer, we identified that an IMAP user can craft IMAP LIST commands to orchestrate a Denial Of Service using a vulnerable Regular expression. This affected Apache James prior to 3.6.1 We recommend upgrading to Apache James 3.6.1 or higher , which enforce the use of RE2J regular expression engine to execute regex in linear time without back-tracking.","status":"published","published":"2022-01-04T09:15:07.327Z","modified":"2026-10-24T10:31:03.617573733Z","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":"2026-11-02T15:44:21.249056Z"},{"id":"GHSA-r58x-wjg8-63m9","title":"Denial of Service in Apache James","description":"In Apache James, using Jazzer fuzzer, we identified that an IMAP user can craft IMAP LIST commands to orchestrate a Denial Of Service using a vulnerable Regular expression. This affected Apache James prior to 3.6.1 We recommend upgrading to Apache James 3.6.1 or higher , which enforce the use of RE2J regular expression engine to execute regex in linear time without back-tracking.","status":"published","published":"2022-01-08T00:40:30Z","modified":"2026-09-10T03:49:11.106080514Z","updated_at":"2026-11-02T15:46:55.480549Z"}]}}