Vulnerability in Capgo
CVE-2026-56319
Capgo before 12.128.2 contains an information disclosure vulnerability in the GET /statistics/app/:app_id endpoint that allows app-limited API keys to distinguish existing sibling app IDs through differential error responses. Attackers can enumerate real app IDs outside their allowed scope by observing 500 PGRST116 errors for inaccessible apps versus 401 errors for nonexistent apps, breaking tenant isolation.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.1% 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-73p9-mprg-7r75 (vendor-advisory)
- www.vulncheck.com/advisories/capgo-app-existence-oracle-via-get-statistics-app-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56319?
- CVE-2026-56319 is a medium-severity vulnerability in Capgo, classified under Observable Discrepancy. CVSS score: 4.3/10. Published 2026-06-20.
- How severe is CVE-2026-56319?
- Medium severity. CVSS v3 base score is 4.3 out of 10.