Information disclosure in Capgo
CVE-2026-56244
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (23.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Capgo — versions 0, 12.128.2
Weakness classification (CWE)
References
- github.com/Cap-go/capgo/security/advisories/GHSA-qrrx-x3qf-x87v (vendor-advisory)
- www.vulncheck.com/advisories/capgo-webhook-signing-secret-disclosure-via-non-ad… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56244?
- CVE-2026-56244 is a high-severity vulnerability in Capgo, classified under Information Disclosure. CVSS score: 7.1/10. Published 2026-06-24.
- How severe is CVE-2026-56244?
- High severity. CVSS v3 base score is 7.1 out of 10.