CVE-2026-56310 | Cap-go before 12.128.2 contains an authorization bypass vuln… | CVSS 4.3 MEDIUM

Description

Cap-go before 12.128.2 contains an authorization bypass vulnerability in the GET /organization/members endpoint that allows org-limited API keys to bypass limited_to_orgs restrictions. Attackers with org-limited API keys can read membership data including uid, email, image_url, role, and is_tmp from organizations outside their assigned scope.

Metadata

CVE ID: CVE-2026-56310
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-20 12:53 UTC
Published: 2026-06-24 11:53 UTC
Last updated: 2026-06-24 11:53 UTC
Primary CWE: CWE-285
Improper Authorization
Vendor / Product: Cap-go / capgo
Sources: cve.org · NVD

Severity & Metrics

4.3 MEDIUM CVSS 3.1

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

Affected products (1)

Vendor	Product	Platform	Versions
Cap-go	capgo	—	0 < 12.128.2, 12.128.2

Weakness (CWE)

CWE	Source	Description
CWE-285	cna	Improper Authorization

CVSS scores (2)

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

References (2)

GitHub Security Advisory (GHSA-q7xv-p34q-v365) https://github.com/Cap-go/capgo/security/advisories/GHSA-q7xv-p34q-v365
VulnCheck Advisory: Cap-go - Authorization Bypass in Organization Members Endpoint via API Key Scope Bypass https://www.vulncheck.com/advisories/cap-go-authorization-bypass-in-organization-members-endpoint-via-api-key-scope-bypass