{"cve":"CVE-2023-43644","nvd":{"published":"2023-09-25T20:15:11.977","modified":"2026-06-17T06:26:08.493","status":"Modified","description":"Sing-box is an open source proxy system. Affected versions are subject to an authentication bypass when specially crafted requests are sent to sing-box. This affects all SOCKS5 inbounds with user authentication and an attacker may be able to bypass authentication. Users are advised to update to sing-box 1.4.4 or to 1.5.0-rc.4. Users unable to update should not expose the SOCKS5 inbound to insecure environments.","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:H/A:H","score":9.8},"cwes":["CWE-306"],"references":["https://github.com/SagerNet/sing-box/security/advisories/GHSA-r5hm-mp3j-285g","https://github.com/SagerNet/sing-box/security/advisories/GHSA-r5hm-mp3j-285g"],"products":["sagernet:sing-box"],"source":"nvd","synced_at":"2026-10-19T21:39:34.467980132+00:00"},"epss":{"cve":"CVE-2023-43644","score":0.00823,"percentile":0.57347,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-r5hm-mp3j-285g","url":"https://osv.dev/vulnerability/GHSA-r5hm-mp3j-285g","summary":"sing-box vulnerable to improper authentication in the SOCKS inbound","modified":"2026-09-10T03:50:03.205884551Z","packages":[{"ecosystem":"Go","name":"github.com/sagernet/sing-box","purl":"pkg:golang/github.com/sagernet/sing-box","ranges":["<1.4.5"],"fixed":["1.4.5"]},{"ecosystem":"Go","name":"github.com/sagernet/sing-box","purl":"pkg:golang/github.com/sagernet/sing-box","ranges":[">=1.5.0-beta.1 <1.5.0-rc.5"],"fixed":["1.5.0-rc.5"]},{"ecosystem":"Go","name":"github.com/sagernet/sing","purl":"pkg:golang/github.com/sagernet/sing","ranges":["<0.2.12-0.20230925092853-5b05b5c147d9"],"fixed":["0.2.12-0.20230925092853-5b05b5c147d9"]}]},{"id":"GO-2023-2077","url":"https://osv.dev/vulnerability/GO-2023-2077","summary":"Authentication bypass in github.com/sagernet/sing","modified":"2024-05-20T16:03:47Z","packages":[{"ecosystem":"Go","name":"github.com/sagernet/sing","purl":"pkg:golang/github.com/sagernet/sing","ranges":["<0.2.12-0.20230925092853-5b05b5c147d9"],"fixed":["0.2.12-0.20230925092853-5b05b5c147d9"]}]}],"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."]}