Improper input validation in Corazawaf Coraza
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 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*.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published .
CVSS v3 metric
CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/corazawaf/coraza/security/advisories/GHSA-3wr7-993q-jrff (vendor-advisory)
- www.vulncheck.com/advisories/coraza-before-3.8.1-multipart-filename-charset-han… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-114101?
- CVE-2026-114101 is a medium-severity vulnerability in Corazawaf Coraza, classified under Improper Input Validation. CVSS score: 4.0/10. Published 2026-10-21.
- How severe is CVE-2026-114101?
- Medium severity. CVSS v3 base score is 4.0 out of 10.