CVE-2026-114101
Medium
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*.
SeverityMedium
CVSS4.0
Exploit probability—
ProductGithub.com/corazawaf/coraza/v3
PublishedOct 21, 2026
First seenOct 21, 2026
Weakness typeCWE-20Improper input validation
How to fix
Update
- github.com/corazawaf/coraza/v33.8.1 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| github.com/corazawaf/coraza/v3Go | v < 3.8.1 | 3.8.1 |
| github.com/corazawaf/corazaGo | No range specified | — |
| github.com/corazawaf/coraza/v2Go | No range specified | — |
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