CVE-2026-56230 | Capgo before 12.128.2 contains a broken object level authori… | CVSS 8.8 HIGH

Description

Capgo before 12.128.2 contains a broken object level authorization vulnerability in middlewareKey() that accepts the client-controlled x-limited-key-id header without validating ownership, allowing authenticated users to adopt cross-tenant limited keys. Attackers can supply another tenant's limited key ID to bypass authorization checks and access unauthorized cross-tenant resources across multiple API endpoints.

Metadata

CVE ID: CVE-2026-56230
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-19 21:46 UTC
Published: 2026-06-30 22:08 UTC
Last updated: 2026-07-01 14:28 UTC
Primary CWE: CWE-639
Authorization Bypass Through User-Controlled Key
Vendor / Product: Capgo / Capgo
Sources: cve.org · NVD

Severity & Metrics

8.8 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Capgo	Capgo	—	0 < 12.128.2, 12.128.2

Weakness (CWE)

CWE	Source	Description
CWE-639	cna	Authorization Bypass Through User-Controlled Key

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.8	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References (2)

GitHub Security Advisory (GHSA-cppm-733w-hg86) https://github.com/Cap-go/capgo/security/advisories/GHSA-cppm-733w-hg86
VulnCheck Advisory: Capgo - Broken Object Level Authorization via x-limited-key-id Header https://www.vulncheck.com/advisories/capgo-broken-object-level-authorization-via-x-limited-key-id-header