Unchecked Return Value Affecting github.com/caddyserver/caddy/modules/caddytls package, versions <2.11.1
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMCADDYSERVERCADDYMODULESCADDYTLS-15364931
- published28 Feb 2026
- disclosed24 Feb 2026
- creditmoscowchill
Introduced: 24 Feb 2026
CVE-2026-27586 Â (opens in a new tab)How to fix?
Upgrade github.com/caddyserver/caddy/modules/caddytls to version 2.11.1 or higher.
Overview
Affected versions of this package are vulnerable to Unchecked Return Value due to improper error handling in the provision function. An attacker can gain unauthorized access by presenting a client certificate signed by any system-trusted certificate authority, bypassing the intended private CA trust boundary.