CVE-2026-65834

Capsule is a multi-tenancy and policy-based framework for Kubernetes. Prior to 0.13.8, CapsuleConfiguration.Spec.NodeMetadata.ForbiddenLabels.Regex and CapsuleConfiguration.Spec.NodeMetadata.ForbiddenAnnotations.Regex were not validated by the configuration admission webhook, allowing a Cluster Admin to store a malformed regex that later reached regexp.MustCompile in pkg/api/forbidden_list.go through internal/webhook/node/user_metadata.go and crashed the node admission webhook on Node create, update, or patch requests. This issue is fixed in version 0.13.8.

CVSS v3 6.8 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/projectcapsule/capsule/releases/tag/v0.13.8
https://github.com/projectcapsule/capsule/security/advisories/GHSA-68cj-mvg9-rgm2
https://github.com/projectcapsule/capsule/security/advisories/GHSA-68cj-mvg9-rgm2

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-30 20:18

Updated : 2026-07-31 12:16

NVD link : CVE-2026-65834

Mitre link : CVE-2026-65834

CVE.ORG link : CVE-2026-65834

JSON object : View

Products Affected

No product.

CWE

CWE-20

Improper Input Validation

CWE-248

Uncaught Exception

{"id": "CVE-2026-65834", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-65834", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-31T11:26:23.756923Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 2.3}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "projectcapsule", "product": "capsule", "versions": [{"status": "affected", "version": "< 0.13.8"}]}]}], "published": "2026-07-30T20:18:13.107", "references": [{"url": "https://github.com/projectcapsule/capsule/releases/tag/v0.13.8", "source": "security-advisories@github.com"}, {"url": "https://github.com/projectcapsule/capsule/security/advisories/GHSA-68cj-mvg9-rgm2", "source": "security-advisories@github.com"}, {"url": "https://github.com/projectcapsule/capsule/security/advisories/GHSA-68cj-mvg9-rgm2", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-248"}]}], "descriptions": [{"lang": "en", "value": "Capsule is a multi-tenancy and policy-based framework for Kubernetes. Prior to 0.13.8, CapsuleConfiguration.Spec.NodeMetadata.ForbiddenLabels.Regex and CapsuleConfiguration.Spec.NodeMetadata.ForbiddenAnnotations.Regex were not validated by the configuration admission webhook, allowing a Cluster Admin to store a malformed regex that later reached regexp.MustCompile in pkg/api/forbidden_list.go through internal/webhook/node/user_metadata.go and crashed the node admission webhook on Node create, update, or patch requests. This issue is fixed in version 0.13.8."}], "lastModified": "2026-07-31T12:16:53.700", "sourceIdentifier": "security-advisories@github.com"}