{"cve":"CVE-2026-114101","nvd":{"published":"2026-10-21T01:17:35.740","modified":"2026-10-22T17:34:37.867","status":"Awaiting Analysis","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*.","cvss_v4":{"vector":"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","score":6.3},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N","score":4.0},"cwes":["CWE-20"],"references":["https://github.com/corazawaf/coraza/security/advisories/GHSA-3wr7-993q-jrff","https://www.vulncheck.com/advisories/coraza-before-3.8.1-multipart-filename-charset-handling-files-rule-bypass"],"products":[],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-114101","score":0.00251,"percentile":0.16274,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-3wr7-993q-jrff","url":"https://osv.dev/vulnerability/GHSA-3wr7-993q-jrff","summary":"Coraza: Multipart filename* (RFC 5987) charset restriction lets a decoy filename bypass FILES-based rules","modified":"2026-10-21T10:57:00.041974308Z","packages":[{"ecosystem":"Go","name":"github.com/corazawaf/coraza/v3","purl":"pkg:golang/github.com/corazawaf/coraza/v3","ranges":["<3.8.1"],"fixed":["3.8.1"]}]},{"id":"GO-2026-6691","url":"https://osv.dev/vulnerability/GO-2026-6691","summary":"Coraza: Multipart filename* (RFC 5987) charset restriction lets a decoy filename bypass FILES-based rules in github.com/corazawaf/coraza","modified":"2026-10-21T10:57:00.041974308Z","packages":[{"ecosystem":"Go","name":"github.com/corazawaf/coraza","purl":"pkg:golang/github.com/corazawaf/coraza","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/corazawaf/coraza/v2","purl":"pkg:golang/github.com/corazawaf/coraza/v2","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/corazawaf/coraza/v3","purl":"pkg:golang/github.com/corazawaf/coraza/v3","ranges":["<3.8.1"],"fixed":["3.8.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}