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CVE-2026-27590 Caddy: Unicode case-folding length expansion causes incorrect split_path index (SCRIPT_NAME/PATH_INFO confusion) in FastCGI transport

🗓️ 24 Feb 2026 16:33:41Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 19 Views

Caddy 2.11.1 fixes Unicode length change in FastCGI path split to avoid SCRIPT_NAME and PATH_INFO confusion.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-27590
24 Feb 202616:33
attackerkb
AlpineLinux
CVE-2026-27590
24 Feb 202616:33
alpinelinux
Information Security Automation
March Linux Patch Wednesday
30 Mar 202620:00
avleonov
Circl
CVE-2026-27590
23 Feb 202604:22
circl
CNNVD
Caddy 安全漏洞
24 Feb 202600:00
cnnvd
CVE
CVE-2026-27590
24 Feb 202616:33
cve
Debian CVE
CVE-2026-27590
24 Feb 202616:33
debiancve
Github Security Blog
Caddy: Unicode case-folding length expansion causes incorrect split_path index in FastCGI transport
24 Feb 202620:39
github
NVD
CVE-2026-27590
24 Feb 202617:29
nvd
OSV
CVE-2026-27590 Caddy: Unicode case-folding length expansion causes incorrect split_path index (SCRIPT_NAME/PATH_INFO confusion) in FastCGI transport
24 Feb 202616:33
osv
Rows per page
[
  {
    "vendor": "caddyserver",
    "product": "caddy",
    "versions": [
      {
        "version": "< 2.11.1",
        "status": "affected"
      }
    ]
  }
]

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