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*.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| corazawaf | coraza | < 3.8.1 | 3.8.1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
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anywaye/nilepatch-coraza-bypass ★ 0 · Oct 22, 2026
Go app using Coraza WAF (CVE-2026-114101 bypass)
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/corazawaf/coraza | all versions | — | GO-2026-6691 |
| Go | github.com/corazawaf/coraza/v2 | all versions | — | GO-2026-6691 |
| Go | github.com/corazawaf/coraza/v3 | < 3.8.1 | 3.8.1 | GHSA-3wr7-993q-jrff |
References
- GitHub Security Advisory (GHSA-3wr7-993q-jrff) vendor-advisory
- VulnCheck Advisory: Coraza before 3.8.1 Multipart filename* Charset Handling FILES Rule Bypass third-party-advisory