PT-2026-44722 · Capsule · Capsule

Xy585 · Published 2026-05-28 · Updated 2026-06-16 · CVE-2026-30963

Positive Technologies (AI Summary)

CVSS v3.1

3.9

Low

Base vector

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

Name of the Vulnerable Software and Affected Versions Capsule versions prior to 0.13.0

Description Capsule uses a webhook to validate update requests targeting namespaces to prevent namespace hijacking. However, the webhook fails to define interception rules for the 'namespace/finalize' and 'namespace/status' subresource APIs. Since these APIs can modify the metadata field of a namespace, a tenant administrator with permissions to modify these subresources can successfully perform namespace hijacking by altering the ownerReferences variable.

Recommendations Update to version 0.13.0. As a temporary mitigation, add the 'namespaces', 'namespaces/status', and 'namespace/finalize' subresources to the resources list in the ValidatingWebhookConfiguration rules.

Exploit

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2026-30963

GHSA-2WW6-HF35-MFJM

GO-2026-5043

Affected Products

Capsule

References · 9

• 🔥 https://github.com/projectcapsule/capsule/security/advisories/GHSA-2ww6-hf35-mfjm · Exploit
• https://osv.dev/vulnerability/GHSA-2ww6-hf35-mfjm · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-30963 · Security Note
• https://osv.dev/vulnerability/GO-2026-5043 · Vendor Advisory
• https://github.com/projectcapsule/capsule/releases/tag/v0.13.0 · Note
• https://github.com/projectcapsule/capsule · Note
• https://twitter.com/dailycve/status/2062373972117754179 · Twitter Post
• https://t.me/cveNotify/165639 · Telegram Post
• https://t.me/cveNotify/165864 · Telegram Post