CVE-2026-56244 | THREATINT

Description

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.

PUBLISHED Reserved 2026-06-19 | Published 2026-06-24 | Updated 2026-06-24 | Assigner VulnCheck

HIGH: 7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

HIGH: 7.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Problem types

Exposure of Sensitive Information to an Unauthorized Actor

Product status

Default status

unaffected

Any version before 12.128.2

affected

12.128.2 (semver)

unaffected

Credits

Judel777 reporter

References

github.com/.../capgo/security/advisories/GHSA-qrrx-x3qf-x87v exploit

github.com/.../capgo/security/advisories/GHSA-qrrx-x3qf-x87v (GitHub Security Advisory (GHSA-qrrx-x3qf-x87v)) vendor-advisory

www.vulncheck.com/...secret-disclosure-via-non-admin-api-key (VulnCheck Advisory: Capgo - Webhook Signing Secret Disclosure via Non-Admin API Key) third-party-advisory

cve.org (CVE-2026-56244)

nvd.nist.gov (CVE-2026-56244)

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