CVE-2026-56244CWE-200

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

High · published June 24, 2026

CVSS v4.0
7.1
EPSS
0%
Percentile
24.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.1 · HIGH
Vector
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
EPSS
0.00328 · 24.7th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2026-06-24T11:53Z
EPSS history
Timeline
  • 24 JUN 11:53Z
    Capgo - Webhook Signing Secret Disclosure via Non-Admin API Key
    cvelistv5