CVE-2026-114101
Coraza before 3.8.1 Multipart filename* Charset Handling FILES Rule Bypass
CVSS Score
4.0
EPSS Score
0.0%
EPSS Percentile
0th
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*.
| CWE | CWE-20 |
| Vendor | corazawaf |
| Product | coraza |
| Published | Oct 21, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
None
Affected Versions
corazawaf / coraza
0 < 3.8.1
References
Credits
airween janmrow