What’s Vulnerable › Vulnerabilities

CVE-2026-56303: Capgo - Unauthenticated API Key Metadata Disclosure via SECURITY DEFINER RPC Function

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-11 · updated 2026-07-13
• Weakness: CWE-200

Description

Capgo before 12.128.2 contains an information disclosure vulnerability in the find_apikey_by_value PostgreSQL function marked SECURITY DEFINER and executable by the anon role. Unauthenticated attackers can call this function via the /rest/v1/rpc/find_apikey_by_value endpoint to retrieve sensitive API key metadata including user_id, mode, org scoping, and expiration details when supplied a valid key value.

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-2xjq-h43m-592f
• https://www.vulncheck.com/advisories/capgo-unauthenticated-api-key-metadata-disclosure-via-security-definer-rpc-function
• https://github.com/Cap-go/capgo/security/advisories/GHSA-2xjq-h43m-592f

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