CVSS 3.1
6.8 mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:HCVE-2026-61794
Medium (6.8). EPSS 0.6% chance of exploitation in the next 30 days. Fixed in github.com/projectcapsule/capsule 0.13.7.
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.
Severity
- EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 48% of CVEs (scores of 2026-10-31)
- CWE
- CWE-20
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-gxjc-74v5-3vx3 | Go | github.com/projectcapsule/capsule | >=0.13.0 <0.13.7 | 0.13.7 |
| GO-2026-6521 | Go | github.com/projectcapsule/capsule | >=0.13.0 <0.13.7 | 0.13.7 |
References
- 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
- https://github.com/projectcapsule/capsule/security/advisories/GHSA-gxjc-74v5-3vx3