Vulnerability Description
Capsule is a multi-tenancy and policy-based framework for Kubernetes. From 0.13.0 until 0.13.7, the Tenant update validation in internal/webhook/tenant/validation/forbidden_annotations_regex.go compiles ForbiddenLabels.Regex for both the labels and annotations checks instead of validating ForbiddenAnnotations.Regex. An administrator who can update a Tenant can therefore persist a malformed ForbiddenAnnotations.Regex while leaving the labels expression valid. Namespace creation or update later passes the stored expression through pkg/api/forbidden_list.go, where regexp.MustCompile can panic during forbidden metadata validation and deny namespace operations for the affected tenant. 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-gxjc-74v5-3vx
FAQ
What is CVE-2026-61794?
CVE-2026-61794 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, the Tenant update validation in internal/webhook/tenant/validation/forbidden_annotations_regex.go compil...
How severe is CVE-2026-61794?
CVE-2026-61794 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-2026-61794?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.