{"id":"CVE-2026-90453","aliases":["EUVD-2026-76740","GHSA-q82q-369g-qpv8"],"status":"published","title":"Open Redirect in Malcolm","description":"A file-upload handler redirects the authenticated client's browser to a URL taken directly from that same request's Referer header, without validating it against the application's own origin. This allows an authenticated attacker to craft a request that causes another user's browser to be redirected to an arbitrary external destination after completing an upload.","severity":{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00152,"percentile":0.04423,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-601"],"published":"2026-09-11T21:51:25Z","modified":"2026-10-28T02:30:56Z","products":[{"vendor":"cisa","product":"malcolm"},{"vendor":"cisagov","product":"malcolm"}],"references":[{"url":"https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-254-01.json","tags":["government-resource","vendor-advisory","advisory"]},{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-254-01","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90453","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-q82q-369g-qpv8"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90453.json","tags":["advisory"]},{"url":"https://github.com/cisagov/Malcolm","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-90453","title":"Open Redirect in Malcolm","description":"A file-upload handler redirects the authenticated client's browser to a URL taken directly from that same request's Referer header, without validating it against the application's own origin. This allows an authenticated attacker to craft a request that causes another user's browser to be redirected to an arbitrary external destination after completing an upload.","status":"published","published":"2026-09-11T21:51:25.668Z","modified":"2026-10-02T20:56:51.481Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T13:45:47.885058Z"}],"euvd":[{"id":"EUVD-2026-76740","description":"A file-upload handler redirects the authenticated client's browser to a URL taken directly from that same request's Referer header, without validating it against the application's own origin. This allows an authenticated attacker to craft a request that causes another user's browser to be redirected to an arbitrary external destination after completing an upload.","status":"published","published":"2026-09-11T21:51:25Z","modified":"2026-10-02T20:56:51Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T17:27:41.962371Z"}],"ghsa":[{"id":"GHSA-q82q-369g-qpv8","title":"A file-upload handler redirects the authenticated client's browser to a URL taken directly from...","description":"A file-upload handler redirects the authenticated client's browser to a URL taken directly from that same request's Referer header, without validating it against the application's own origin. This allows an authenticated attacker to craft a request that causes another user's browser to be redirected to an arbitrary external destination after completing an upload.","status":"published","published":"2026-09-12T00:31:29Z","modified":"2026-10-02T21:31:57Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","level":"low"},{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/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":"medium"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T15:12:43.646433Z"}],"nvd":[{"id":"CVE-2026-90453","description":"A file-upload handler redirects the authenticated client's browser to a URL taken directly from that same request's Referer header, without validating it against the application's own origin. This allows an authenticated attacker to craft a request that causes another user's browser to be redirected to an arbitrary external destination after completing an upload.","status":"published","published":"2026-09-11T22:16:47.63Z","modified":"2026-10-02T21:16:57.377Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/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":"medium","assessor":"secondary"},{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","level":"low","assessor":"secondary"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T14:12:46.62721Z"}],"osv":[{"id":"CVE-2026-90453","title":"Open Redirect in Malcolm","description":"A file-upload handler redirects the authenticated client's browser to a URL taken directly from that same request's Referer header, without validating it against the application's own origin. This allows an authenticated attacker to craft a request that causes another user's browser to be redirected to an arbitrary external destination after completing an upload.","status":"published","published":"2026-09-11T21:51:25.668Z","modified":"2026-10-28T02:30:56.590239462Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T15:45:20.269367Z"}]}}