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*.
- CVSS 4.0
- 6.3
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 - CVSS 3.1
- 4.0
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N - EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 16% of CVEs (scores of 2026-10-25)
- CWE
- CWE-20
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-3wr7-993q-jrff | Go | github.com/corazawaf/coraza/v3 | <3.8.1 | 3.8.1 |
| GO-2026-6691 | Go | github.com/corazawaf/coraza | all versions | no fix published |
| GO-2026-6691 | Go | github.com/corazawaf/coraza/v2 | all versions | no fix published |
| GO-2026-6691 | Go | github.com/corazawaf/coraza/v3 | <3.8.1 | 3.8.1 |