MEDIUM 6.3 NVD
CVE-2026-114101
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
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*.
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-handli
This medium severity vulnerability with a CVSS score of 6.3 was published on 2026-10-21 via NVD.
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