{"cve":"CVE-2021-4070","nvd":{"published":"2022-02-23T20:15:09.167","modified":"2026-06-17T04:18:59.397","status":"Modified","description":"Off-by-one Error in GitHub repository v2fly/v2ray-core prior to 4.44.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","score":9.1},"cwes":["CWE-193"],"references":["https://github.com/v2fly/v2ray-core/commit/c1af2bfd7aa59a4482aa7f6ec4b9208c1d350b5c","https://huntr.dev/bounties/8da19456-4d89-41ef-9781-a41efd6a1877","https://github.com/v2fly/v2ray-core/commit/c1af2bfd7aa59a4482aa7f6ec4b9208c1d350b5c","https://huntr.dev/bounties/8da19456-4d89-41ef-9781-a41efd6a1877"],"products":["v2fly:v2ray-core"],"source":"nvd","synced_at":"2026-10-19T21:28:04.509275555+00:00"},"epss":{"cve":"CVE-2021-4070","score":0.00858,"percentile":0.58458,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-4cxw-hq44-r344","url":"https://osv.dev/vulnerability/GHSA-4cxw-hq44-r344","summary":"Off-by-one Error in v2fly/v2ray-core","modified":"2024-08-21T15:27:03.016510Z","packages":[{"ecosystem":"Go","name":"github.com/v2fly/v2ray-core/v4","purl":"pkg:golang/github.com/v2fly/v2ray-core/v4","ranges":["<4.44.0"],"fixed":["4.44.0"]},{"ecosystem":"Go","name":"github.com/v2fly/v2ray-core","purl":"pkg:golang/github.com/v2fly/v2ray-core","ranges":["all versions"],"fixed":[]}]},{"id":"GO-2022-0550","url":"https://osv.dev/vulnerability/GO-2022-0550","summary":"Off-by-one Error in v2fly/v2ray-core in github.com/v2fly/v2ray-core","modified":"2026-03-03T04:50:31.927824Z","packages":[{"ecosystem":"Go","name":"github.com/v2fly/v2ray-core","purl":"pkg:golang/github.com/v2fly/v2ray-core","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/v2fly/v2ray-core/v4","purl":"pkg:golang/github.com/v2fly/v2ray-core/v4","ranges":["<4.44.0"],"fixed":["4.44.0"]}]}],"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."]}