What’s Vulnerable › Vulnerabilities

CVE-2026-56319: Capgo - App Existence Oracle via GET /statistics/app/:app_id

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-20 · updated 2026-06-22
• Weakness: CWE-203

Description

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.

Affected products

• Capgo: before 12.128.2 — fixed in 12.128.2

How to fix

Upgrade to a fixed version: Capgo 12.128.2. Check the vendor advisory for mitigations.

References

• https://github.com/Cap-go/capgo/security/advisories/GHSA-73p9-mprg-7r75
• https://www.vulncheck.com/advisories/capgo-app-existence-oracle-via-get-statistics-app-app-id
• https://github.com/Cap-go/capgo/security/advisories/GHSA-73p9-mprg-7r75

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