{"id":"CVE-2026-27641","summary":"Flask-Reuploaded vulnerable to Remote Code Execution via Server-Side Template Injection","details":"Flask-Reuploaded provides file uploads for Flask. A critical path traversal and extension bypass vulnerability in versions prior to 1.5.0 allows remote attackers to achieve arbitrary file write and remote code execution through Server-Side Template Injection (SSTI). Flask-Reuploaded has been patched in version 1.5.0. Some workarounds are available. Do not pass user input to the `name` parameter, use auto-generated filenames only, and implement strict input validation if `name` must be used.","aliases":["GHSA-65mp-fq8v-56jr"],"modified":"2026-04-02T13:21:19.153954Z","published":"2026-02-25T03:54:54.391Z","database_specific":{"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27641.json","cwe_ids":["CWE-1336"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27641.json"},{"type":"ADVISORY","url":"https://github.com/jugmac00/flask-reuploaded/security/advisories/GHSA-65mp-fq8v-56jr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27641"},{"type":"FIX","url":"https://github.com/jugmac00/flask-reuploaded/commit/d64c6b2f71cb73734fc38baa0e3e156926361288"},{"type":"FIX","url":"https://github.com/jugmac00/flask-reuploaded/pull/180"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/jugmac00/flask-reuploaded","events":[{"introduced":"0"},{"fixed":"d64c6b2f71cb73734fc38baa0e3e156926361288"}]}],"versions":["0.2.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27641.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"1.5.0"}]},{"events":[{"introduced":"0"},{"last_affected":"Server-Side"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}