CVE-2026-61794

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.

• CWE-20

• https://github.com/projectcapsule/capsule/commit/8d89d6865df6f41c7faa22fc9e807a57b01bfd0e
• 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-74v5-3vx3

Published

Sep 18, 2026

Last Modified

Sep 18, 2026

Status

Received

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