{"id":"CVE-2026-114101","summary":"Coraza before 3.8.1 Multipart filename* Charset Handling FILES Rule Bypass","details":"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*.","aliases":["GHSA-3wr7-993q-jrff","GO-2026-6691"],"modified":"2026-10-21T10:57:00.041974308Z","published":"2026-10-21T00:37:03.229Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-20"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114101.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114101.json"},{"type":"ADVISORY","url":"https://github.com/corazawaf/coraza/security/advisories/GHSA-3wr7-993q-jrff"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114101"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/coraza-before-3.8.1-multipart-filename-charset-handling-files-rule-bypass"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/corazawaf/coraza","events":[{"introduced":"0"},{"fixed":"9f8521398d1ff023b958fad0b944cac265763866"}],"database_specific":{"extracted_events":[{"strategy":"StandardRange","range":[{"introduced":"0"},{"fixed":"3.8.1"}],"source":"AFFECTED_FIELD"}]}}],"versions":["v3.8.0","v3.7.0","v3.6.0","v3.5.0","v3.4.0","v3.3.3","v3.3.2","v3.3.1","v3.3.0","v3.2.1","v3.2.0","v3.1.0","v3.0.4","v3.0.3","v3.0.2","v3.0.1","v3.0.0","v3.0.0-rc.3","v3.0.0-rc.2","v3.0.0-rc.1","v2.0.0","v2.0.0-rc.3","v2.0.0-rc.2","v2.0.0-rc.1","v2.0.0-beta.6","v2.0.0-beta.5","v2.0.0-beta.4","v2.0.0-beta.3","v2.0.0-beta.2","v2.0.0-alpha.1","v1.2.0","v1.1.0","v1.0.0","v1.0.0-beta.7","v1.0.0-beta.6","v1.0.0-beta.5","v1.0.0-beta.4","v1.0.0-beta.3","v1.0.0-beta.2","v1.0.0-beta.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-114101.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N"}]}