Information disclosure in Capgo
CVE-2026-56079
Capgo before 12.128.2 contains a cross-tenant authorization bypass vulnerability in PostgREST endpoints that allows org-scoped read API keys to access other tenants' webhook secrets and delivery logs. Attackers can query the webhooks and webhook_deliveries endpoints to exfiltrate HMAC signing secrets and delivery payloads, enabling forged webhook events against victim organizations.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (33.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Capgo — versions 0, 12.128.2
Weakness classification (CWE)
References
- github.com/Cap-go/capgo/security/advisories/GHSA-hj3h-v877-g5rx (vendor-advisory)
- www.vulncheck.com/advisories/capgo-cross-tenant-authorization-bypass-via-postgr… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56079?
- CVE-2026-56079 is a medium-severity vulnerability in Capgo, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-06-19.
- How severe is CVE-2026-56079?
- Medium severity. CVSS v3 base score is 6.5 out of 10.