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9.8

Caddy server could be manipulated to bypass security

published 1 month ago
Summary

The Caddy web server (cleanstart/caddy) contains a flaw that may let an attacker interfere with its encrypted connections or perform unauthorized actions. This could expose data or disrupt your services. Apply the latest updates or patches from the vendor as soon as possible.

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-WK22640 · OSV
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