{"id":"CVE-2026-93903","aliases":["EUVD-2026-89955","GHSA-8x5w-4247-99g6"],"status":"published","title":"LiteSpeed Web Server (LSWS) before 6.3.7 build 1 mishandles internal redirect URL validation in a...","description":"LiteSpeed Web Server (LSWS) before 6.3.7 build 1 mishandles internal redirect URL validation in a certain \"corner case\" of %252e%252e double decoding, letting a low-privileged tenant execute code in the context of a different account.","severity":{"version":"4.0","score":9.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00352,"percentile":0.29271,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-174"],"published":"2026-09-30T13:44:11Z","modified":"2026-11-05T06:34:32Z","exploits":[{"source":"pocgithub","id":"Tautvydas-Aleliunas/CVE-2026-93903","title":"Tautvydas-Aleliunas/CVE-2026-93903","date":"2026-10-28","url":"https://github.com/Tautvydas-Aleliunas/CVE-2026-93903"}],"products":[{"vendor":"litespeed technologies","product":"litespeed web server"},{"vendor":"litespeedtech","product":"litespeed web server"}],"references":[{"url":"https://lnkd.in/p/d2HZDcUC","tags":["third-party-advisory"]},{"url":"https://www.litespeedtech.com/products/litespeed-web-server/release-log"},{"url":"https://docs.litespeedtech.com/lsws/changelog/#v6-3-7-build-1"},{"url":"https://github.com/Tautvydas-Aleliunas/CVE-2026-93903"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93903"},{"url":"https://github.com/advisories/GHSA-8x5w-4247-99g6"}],"sources":{"cve":[{"id":"CVE-2026-93903","description":"LiteSpeed Web Server (LSWS) before 6.3.7 build 1 mishandles internal redirect URL validation in a certain \"corner case\" of %252e%252e double decoding, letting a low-privileged tenant execute code in the context of a different account.","status":"published","published":"2026-09-30T13:44:11.915Z","modified":"2026-11-05T03:15:00.542Z","cvss":[{"version":"4.0","score":9.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","level":"critical","assessor":"cna"}],"cwes":["CWE-174"],"updated_at":"2026-11-05T06:56:15.67765Z"}],"euvd":[{"id":"EUVD-2026-89955","description":"LiteSpeed Web Server (LSWS) before 6.3.7 build 1 mishandles internal redirect URL validation in a certain \"corner case\" of %252e%252e double decoding, letting a low-privileged tenant execute code in the context of a different account.","status":"published","published":"2026-09-30T13:44:11Z","modified":"2026-11-05T03:15:00Z","cvss":[{"version":"4.0","score":9.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","level":"critical"}],"updated_at":"2026-11-05T06:54:33.955364Z"}],"ghsa":[{"id":"GHSA-8x5w-4247-99g6","title":"LiteSpeed Web Server (LSWS) before 6.3.7 build 1 mishandles internal redirect URL validation in a...","description":"LiteSpeed Web Server (LSWS) before 6.3.7 build 1 mishandles internal redirect URL validation in a certain \"corner case.\"","status":"published","published":"2026-09-30T15:31:33Z","modified":"2026-11-05T06:34:32Z","cvss":[{"version":"4.0","score":9.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"}],"cwes":["CWE-174"],"updated_at":"2026-11-05T06:56:57.728857Z"}],"nvd":[{"id":"CVE-2026-93903","description":"LiteSpeed Web Server (LSWS) before 6.3.7 build 1 mishandles internal redirect URL validation in a certain \"corner case\" of %252e%252e double decoding, letting a low-privileged tenant execute code in the context of a different account.","status":"published","published":"2026-09-30T14:17:37.06Z","modified":"2026-11-05T04:17:13.083Z","cvss":[{"version":"4.0","score":9.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"}],"cwes":["CWE-174"],"updated_at":"2026-11-05T06:56:40.786164Z"}]}}