Vulnerability Description
Capsule is a multi-tenancy and policy-based framework for Kubernetes. From 0.13.0 until 0.13.7, hostnameRegexHandler.OnUpdate in internal/webhook/tenant/validation/hostname_regex.go reverses the new and old Tenant parameters and validates the previous AllowedHostnames.Regex instead of the submitted value. A cluster administrator can therefore store a malformed AllowedHostnames.Regex after the webhook accepts the update based on stale valid state. Subsequent Ingress creation or update reaches validate_hostnames.go, which evaluates the malformed pattern, ignores the regular-expression error, and treats every hostname as unmatched, blocking Ingress operations for the affected tenant until an administrator repairs the Tenant configuration. This issue is fixed in version 0.13.7.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/projectcapsule/capsule/commit/8d89d6865df6f41c7faa22fc9e807a5
- https://github.com/projectcapsule/capsule/pull/1983
- https://github.com/projectcapsule/capsule/releases/tag/v0.13.7
- https://github.com/projectcapsule/capsule/security/advisories/GHSA-f94q-w3w8-cj6
FAQ
What is CVE-2026-61795?
CVE-2026-61795 is a vulnerability with a CVSS score of 6.8 (MEDIUM). Capsule is a multi-tenancy and policy-based framework for Kubernetes. From 0.13.0 until 0.13.7, hostnameRegexHandler.OnUpdate in internal/webhook/tenant/validation/hostname_regex.go reverses the new a...
How severe is CVE-2026-61795?
CVE-2026-61795 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-61795?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.