Auth bypass in Getmaxun Maxun
CVE-2026-56767
Maxun before 0.0.42 contains a cross-tenant insecure direct object reference vulnerability in storage and webhook API handlers that allows authenticated users to access other users' robots and OAuth tokens. Attackers can read plaintext Google and Airtable access tokens, modify, delete, or execute other users' robots by bypassing ownership checks in API endpoints.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (46.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Getmaxun Maxun — versions 0, 0.0.42
Weakness classification (CWE)
References
- github.com/getmaxun/maxun/issues/1079 (technical-description)
- github.com/getmaxun/maxun/pull/1088 (issue-tracking)
- github.com/getmaxun/maxun/commit/11db0257531f1c23dec94727793c9444ee2873cf (patch)
- www.vulncheck.com/advisories/maxun-cross-tenant-idor-in-storage-and-webhook-api… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56767?
- CVE-2026-56767 is a high-severity vulnerability in Getmaxun Maxun, classified under Missing Authorization. CVSS score: 8.8/10. Published 2026-06-25.
- How severe is CVE-2026-56767?
- High severity. CVSS v3 base score is 8.8 out of 10.