CVE-2026-56244

Capgo - Webhook Signing Secret Disclosure via Non-Admin API Key

CVSS 7.1 HIGHEPSS 0.2%CWE-200

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.1EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

24 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Capgo before 12.128.2 allows non-admin API keys to read webhook signing secrets via Supabase REST due to insufficient row-level security policies on the webhooks table. Attackers can retrieve the webhook secret and forge valid X-Capgo-Signature headers to send authenticated webhook events to configured receivers, breaking webhook authenticity and integrity.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Affected products

Capgo · Capgo

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References

https://github.com/Cap-go/capgo/security/advisories/GHSA-qrrx-x3qf-x87v https://www.vulncheck.com/advisories/capgo-webhook-signing-secret-disclosure-via-non-admin-api-key