## Caddy has an RFC 7230 §6.1 compliance issue / Hop-by-hop headers that leak through

- 種別: advisory
- 重大度: low
- 関連技術: go, github
- CVE: CVE-2026-55458
- 公開日時: 2026-10-28T19:49:33.000Z
- 情報源: GitHub Advisory Database (https://github.com/advisories/GHSA-8qx7-j2v2-x6q5)
- パーマリンク: https://vulnpulse.app/items/ghsa-ghsa-8qx7-j2v2-x6q5

影響: go:github.com/caddyserver/caddy/v2 <= 2.11.4 → 2.11.5
AI Disclosure This vulnerability was discovered via deepseek-v4-pro[1m] for finding potential vulnerabilities / inconsistencies in the code base. I made the AI check if Caddy is compliant with various RFCs, incl. 7230. I also used it to help write the PoC, since it was honestly much faster than writing it by hand. I also let it write parts of this advisory text for brevity's sake, but had to rewrite half of it by hand. Summary Caddy's reverse proxy fails to strip RFC 7230 hop-by-hop headers fro…