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SCA: security update for github.com/projectcapsule/capsule (GHSA-gwxr-7h77-7777)

medium Tenable Cloud Security Plugin ID 443380

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Capsule is a multi-tenancy and policy-based framework for Kubernetes. From 0.13.0 until 0.13.6,
 charts/capsule/templates/configuration.yaml configures the validating webhook with namespace/finalize
 instead of the Kubernetes resource name namespaces/finalize. A user with namespaces/finalize RBAC can send
 a PUT request to /api/v1/namespaces/{namespace}/finalize, and the singular rule never matches the plural
 resource, so the validating webhook is not invoked and the user can change the namespace tenant label.
 matchPolicy: Equivalent does not compensate because it handles API group and version equivalence rather
 than resource-name errors. This vulnerability is fixed in 0.13.6. (CVE-2026-55636)

Solution

Update the github.com/projectcapsule/capsule library and its related packages to version 0.13.6 or later.

See Also

https://github.com/advisories/GHSA-gwxr-7h77-7777

Plugin Details

Severity: Medium

ID: 443380

Version: Revision 1.4

Type: Local

Family: SCA Checks

Published: 6/18/2026

Updated: 9/16/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3.9

Percentile: 52.75

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: High

Base Score: 7.3

Temporal Score: 5.4

Vector: CVSS2#AV:N/AC:L/Au:M/C:P/I:C/A:P

CVSS Score Source: CVE-2026-55636

CVSS v3

Risk Factor: Medium

Base Score: 5.7

Temporal Score: 5

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:H/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/17/2026

Vulnerability Publication Date: 6/17/2026

Reference Information

CVE: CVE-2026-55636

cwe: CWE-863