{"id":"CVE-2026-72583","aliases":["EUVD-2026-55223","GHSA-6vrh-w6p3-v6fh"],"status":"published","title":"fastschema - Stored Cross-Site Scripting via MIME Type Bypass in File Upload","description":"A stored cross-site scripting (XSS) vulnerability in fastschema through v0.15.1 allows a low-privileged authenticated user to upload an SVG file containing malicious JavaScript by bypassing the MIME type allow-list check.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00255,"percentile":0.17212,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-08-10T10:41:24Z","modified":"2026-10-28T02:31:02Z","products":[{"vendor":"fastschema","product":"fastschema"}],"references":[{"url":"https://github.com/fastschema/fastschema","tags":["third-party-advisory","advisory"]},{"url":"https://github.com/fastschema/fastschema/blob/main/pkg/rclonefs/base.go","tags":["technical-description","article"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72583","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-6vrh-w6p3-v6fh"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72583.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-72583","title":"fastschema - Stored Cross-Site Scripting via MIME Type Bypass in File Upload","description":"A stored cross-site scripting (XSS) vulnerability in fastschema through v0.15.1 allows a low-privileged authenticated user to upload an SVG file containing malicious JavaScript by bypassing the MIME type allow-list check.","status":"published","published":"2026-08-10T10:41:24.636Z","modified":"2026-08-10T13:18:41.553Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:19:52.016971Z"}],"euvd":[{"id":"EUVD-2026-55223","description":"A stored cross-site scripting (XSS) vulnerability in fastschema through v0.15.1 allows a low-privileged authenticated user to upload an SVG file containing malicious JavaScript by bypassing the MIME type allow-list check.","status":"published","published":"2026-08-10T10:41:24Z","modified":"2026-08-10T13:18:41Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T18:02:05.732685Z"}],"ghsa":[{"id":"GHSA-6vrh-w6p3-v6fh","title":"A stored cross-site scripting (XSS) vulnerability in fastschema through v0.15.1 allows a low...","description":"A stored cross-site scripting (XSS) vulnerability in fastschema through v0.15.1 allows a low-privileged authenticated user to upload an SVG file containing malicious JavaScript by bypassing the MIME type allow-list check.","status":"published","published":"2026-08-10T12:31:53Z","modified":"2026-08-10T12:32:01Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:10:13.54571Z"}],"nvd":[{"id":"CVE-2026-72583","description":"A stored cross-site scripting (XSS) vulnerability in fastschema through v0.15.1 allows a low-privileged authenticated user to upload an SVG file containing malicious JavaScript by bypassing the MIME type allow-list check.","status":"published","published":"2026-08-10T11:17:31.27Z","modified":"2026-10-24T15:10:00.19Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:35.743275Z"}],"osv":[{"id":"CVE-2026-72583","title":"fastschema - Stored Cross-Site Scripting via MIME Type Bypass in File Upload","description":"A stored cross-site scripting (XSS) vulnerability in fastschema through v0.15.1 allows a low-privileged authenticated user to upload an SVG file containing malicious JavaScript by bypassing the MIME type allow-list check.","status":"published","published":"2026-08-10T10:41:24.636Z","modified":"2026-10-28T02:31:02.034984392Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:45:15.88521Z"}]}}