Vulnerability · Published Jun 19, 2026 · Assigned by VulnCheck

CVE-2026-56079Capgo - Cross-Tenant Authorization Bypass via PostgREST Webhook Access

Medium 6.5

In plain English

A medium-severity information exposure in Capgo from Capgo. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 64.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Capgo	Capgo	0 – before 12.128.2

Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

GHSA Advisory GHSA-hj3h-v877-g5rx vendor-advisory
VulnCheck Advisory: Capgo - Cross-Tenant Authorization Bypass via PostgREST Webhook Access third-party-advisory