{"id":"CVE-2026-114101","published":"2026-10-21T01:17:35.740","lastModified":"2026-10-22T17:34:37.867","description":"Coraza before 3.8.1 extracts multipart upload filenames with Go's mime.ParseMediaType, which silently ignores RFC 5987 filename* parameters whose charset is not utf-8 or us-ascii. Unauthenticated attackers can send a decoy filename with filename*=iso-8859-1''shell.php, or filename* alone, so FILES-based rules never see the real name, letting dangerous uploads reach backends that honor filename*.","cvssScore":4,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N","cwes":["CWE-20"],"vendors":[],"products":[],"references":[{"url":"https://github.com/corazawaf/coraza/security/advisories/GHSA-3wr7-993q-jrff","tags":[]},{"url":"https://www.vulncheck.com/advisories/coraza-before-3.8.1-multipart-filename-charset-handling-files-rule-bypass","tags":[]}],"exploitRefs":[{"url":"https://github.com/corazawaf/coraza/security/advisories/GHSA-3wr7-993q-jrff","tags":[]}],"hasPoc":true,"ai":null}