{"id":"CVE-2021-27293","aliases":["GHSA-9pq7-rcxv-47vq"],"url":"https://o3.security/vulnerability/CVE-2021-27293","summary":"Incorrect Regular Expression in RestSharp","details":"RestSharp < 106.11.8-alpha.0.13 uses a regular expression which is vulnerable to Regular Expression Denial of Service (ReDoS) when converting strings into DateTimes. If a server responds with a malicious string, the client using RestSharp will be stuck processing it for an exceedingly long time. Thus the remote server can trigger Denial of Service.","published":"2021-07-12T11:15:08.100Z","modified":"2026-07-08T05:59:30.281747570Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"NuGet","name":"RestSharp","fixedVersion":"106.11.8-alpha.0.13"}],"fix":null,"references":[{"type":"WEB","url":"https://restsharp.dev/"},{"type":"FIX","url":"https://github.com/restsharp/RestSharp/issues/1556"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T05:59:30.281747570Z"}}