{"cve":"CVE-2021-40110","nvd":{"published":"2022-01-04T09:15:07.327","modified":"2026-06-17T04:06:32.313","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":[],"references":["http://www.openwall.com/lists/oss-security/2022/01/04/2","https://www.openwall.com/lists/oss-security/2022/01/04/2","http://www.openwall.com/lists/oss-security/2022/01/04/2","https://www.openwall.com/lists/oss-security/2022/01/04/2"],"products":["apache:james"],"source":"nvd","synced_at":"2026-10-19T21:26:33.761856376+00:00"},"epss":{"cve":"CVE-2021-40110","score":0.02954,"percentile":0.87181,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-r58x-wjg8-63m9","url":"https://osv.dev/vulnerability/GHSA-r58x-wjg8-63m9","summary":"Denial of Service in Apache James","modified":"2026-09-10T03:49:11.106080514Z","packages":[{"ecosystem":"Maven","name":"org.apache.james:james-server","purl":"pkg:maven/org.apache.james/james-server","ranges":[">=3.1.0 <3.6.1"],"fixed":["3.6.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}