Medium 6.9Published Feb 24, 2026

CVE-2026-27585Caddy's improper sanitization of glob characters in file matcher may lead to bypassing security protections

Updated under an hour ago (Oct 27, 2026, 4:30 PM ET)

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It affects caddyserver caddy. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for caddyserver caddy

Exploited in the last 30 days

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the path sanitization routine in file matcher doesn't sanitize backslashes which can lead to bypassing path related security protections. It affects users with specific Caddy and environment configurations. Version 2.11.1 fixes the issue.

CVSS: 6.9 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P
Weakness (CWE): CWE-20
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

caddyserver caddy caddyserver:caddy (from the name)	before 2.11.1	CNA record
caddyserver caddy caddyserver:caddy	before 2.11.1	NVD

References

References

https://github.com/caddyserver/caddy/security/advisories/GHSA-4xrr-hq4w-6vf4	x-refsource-confirm, exploit, vendor-advisory
https://github.com/caddyserver/caddy/blob/68d50020eef0d4c3398b878f17c8092ca5b58ca0/modules/caddyhttp/fileserver/matcher.go#L361	x-refsource-misc, product
https://github.com/caddyserver/caddy/blob/68d50020eef0d4c3398b878f17c8092ca5b58ca0/modules/caddyhttp/fileserver/matcher.go#L398	x-refsource-misc, product
https://github.com/caddyserver/caddy/releases/tag/v2.11.1	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.