Capsule tenant owner with "patch namespace" permission can hijack system namespaces
Priority HIGH 73CWE-863Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-863.
Summary
Capsule is a multi-tenancy and policy-based framework for Kubernetes. In Capsule v0.7.0 and earlier, the tenant-owner can patch any arbitrary namespace that has not been taken over by a tenant (i.e., namespaces without the ownerReference field), thereby gaining control of that namespace. Version 0.7.1 contains a patch.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00541 45th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed github.com/projectcapsule/capsule (Go): 0.7.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| projectcapsule | capsule | up to 0.7.0 | — | No fix listed | CNA |
| — | github.com/projectcapsule/capsule (Go) | before 0.7.1 | 0.7.1 | Patch available | GHSA-mq69-4j5w-3qwp |
- capsule Vendorprojectcapsule Affected up to 0.7.0 Fixed in — No fix listed CNA
- github.com/projectcapsule/capsule (Go) Vendor— Affected before 0.7.1 Fixed in 0.7.1 Patch available GHSA-mq69-4j5w-3qwp
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:projectcapsule:capsule:*:*:*:*:*:*:*:* | up to 0.7.0 | Vulnerable | projectcapsule |
- cpe:2.3:a:projectcapsule:capsule:*:*:*:*:*:*:*:* Versions up to 0.7.0 Vulnerable ·projectcapsule
Remediation
- Fix · GHSA-mq69-4j5w-3qwp github.com/projectcapsule/capsule (Go) Fixed in 0.7.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2024-39690
- 2026-10-03 Alias added: GHSA-mq69-4j5w-3qwp
References
More projectcapsule Capsule vulnerabilities
- TI-2026-18364 Capsule TenantResource RawItems Cluster-Scoped Resource Creation Vulnerability CVSS 4.0MEDIUM 6.9
- TI-2026-23788 Capsule Namespace Hijacking via subresource CVSS 3.1LOW 3.9
Sources
- CVE-2024-39690 · CVE Program
- CVE-2024-39690 · NVD
- FIRST EPSS
- GHSA-mq69-4j5w-3qwp · GitHub Advisory Database · CC BY 4.0
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