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TI-2026-46911 Aliases CVE-2026-65834GHSA-68cj-mvg9-rgm2

Improper input validation in projectcapsule capsule

Priority MEDIUM 63CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-248.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00322 25th percentileScored 2026-11-07
Fix Fixed capsule (projectcapsule): 0.13.8github.com/projectcapsule/capsule (Go): 0.13.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
projectcapsulecapsulebefore 0.13.80.13.8Patch availableCNA
—github.com/projectcapsule/capsule (Go)before 0.13.80.13.8Patch availableGHSA-68cj-mvg9-rgm2
  • capsule Vendorprojectcapsule Affected before 0.13.8 Fixed in 0.13.8 Patch available CNA
  • github.com/projectcapsule/capsule (Go) Vendor— Affected before 0.13.8 Fixed in 0.13.8 Patch available GHSA-68cj-mvg9-rgm2

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:projectcapsule:capsule:*:*:*:*:*:*:*:*——projectcapsule
  • cpe:2.3:a:projectcapsule:capsule:*:*:*:*:*:*:*:* Versions — — ·projectcapsule

Remediation

  • Fix · CNA capsule (projectcapsule) Fixed in 0.13.8
  • Fix · GHSA-68cj-mvg9-rgm2 github.com/projectcapsule/capsule (Go) Fixed in 0.13.8 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-65834
  2. 2026-10-03 Alias added: GHSA-68cj-mvg9-rgm2

References

Advisory 1

Other 3

  • TI-2024-26614 Capsule tenant owner with "patch namespace" permission can hijack system namespaces CVSS 3.1HIGH 8.8
  • TI-2025-34881 Capsule tenant owners with "patch namespace" permission can hijack system namespaces label CVSS 3.1CRITICAL 9.1
  • TI-2026-18364 Capsule TenantResource RawItems Cluster-Scoped Resource Creation Vulnerability CVSS 4.0MEDIUM 6.9
  • TI-2026-44157 Capsule: Tenant owner bypasses Capsule's forbidden namespace/service/node label and annotation enforcement CVSS 3.1HIGH 7.1
  • TI-2026-44232 Capsule: Malformed ForbiddenAnnotations.Regex can bypass Tenant validation and trigger namespace admission panic CVSS 3.1MEDIUM 6.8
  • TI-2026-46912 Improper privilege management in projectcapsule capsule CVSS 3.1MEDIUM 6.6
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences