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9.8

Caddy server may let attackers bypass security

published 1 month ago
Summary

The Caddy web server package has a weakness that could allow a remote user to bypass its built‑in encryption and view or alter data. This could expose private information or allow unauthorized changes. Install the latest Caddy update as soon as possible to close the gap.

What to do
  • Update cleanstart caddy to version 2.11.4-r0.
Affected software
Ecosystem VendorProductAffected versions
CleanStart cleanstart caddy < 2.11.4-r0
Fix: upgrade to 2.11.4-r0
Original advisory text
Caddy is an extensible server platform that uses TLS by default
Security vulnerability affects the caddy package. Caddy is an extensible server platform that uses TLS by default.
References
Fix within
Internet-facing 3 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically (estimated)
  • Gives an attacker full control (estimated)
Severity
9.8 Critical
Timeline
Published20 Sep 2026
Updated20 Sep 2026
First seen20 Sep 2026
Sources
CLEANSTART-2026-QE63753 · OSV
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