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Vulnerability record · CVE-2026-56079 · published 19 June 2026

CVE-2026-56079: Information exposure vulnerability

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.

7.1 CVSS 4.0 High EPSS 0.41% · top 67.4% CWE-200 · Information exposure Deferred
7.1CVSS 4.0 base score
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
22 Jun 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/Cap-go/capgo/security/advisories/GHSA-hj3h-v877-g5rx
https://www.vulncheck.com/advisories/capgo-cross-tenant-authorization-bypass-via-postgrest-webhook-access
https://github.com/Cap-go/capgo/security/advisories/GHSA-hj3h-v877-g5rx

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Source: NIST National Vulnerability Database (record CVE-2026-56079), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.