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9.8
cert-manager may mishandle hostname errors
published 9 months ago
Summary
The cert-manager component can incorrectly process certain hostname error conditions, which could prevent it from issuing or renewing security certificates correctly. This may lead to services losing trusted connections or requiring manual certificate management. Update to the latest version of cert-manager or apply the provided patch to resolve the issue.
What to do
- Update cleanstart cert-manager to version 1.19.1-r1.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| CleanStart | cleanstart | cert-manager |
< 1.19.1-r1 Fix: upgrade to 1.19.1-r1
|
Original advisory text
Within HostnameError
Security vulnerability affects the cert-manager package. Within HostnameError.
Internet-facing
3 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically (estimated)
- Gives an attacker full control (estimated)
Timeline
Published30 Jan 2026
Updated18 Sep 2026
First seen18 Sep 2026
Sources
CLEANSTART-2026-OK45738 · OSV
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