Go
CVE-2026-27588
Caddy: MatchHost becomes case-sensitive for large host lists (>100), enabling host-based route/auth bypass
- Severity
- High
- Published
- 24 Feb 2026
- Last changed
- 27 Feb 2026
- Added to UpHeron
- 22 Oct 2026
- Fixed in
- 2.11.1
- Also known as
- GHSA-x76f-jf84-rqj8, GO-2026-4541
- Sources
- OSV.dev and GitHub
Affected software
| Software | Affected versions |
|---|---|
CaddyGo · osv:Go:github.com/caddyserver/caddy/v2 |
|
References
- CVE.org https://www.cve.org/CVERecord?id=CVE-2026-27588
- GitHub Advisory Database https://github.com/advisories/GHSA-x76f-jf84-rqj8
- OSV.dev https://osv.dev/vulnerability/GO-2026-4541