# CVE-2026-56303: Capgo information disclosure in find_apikey_by_value RPC function

Source: https://junglewise.ai/threats/cve-2026-56303-capgo-information-disclosure-in-find-apikey-by-value-rpc-function  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-11. Updated: 2026-07-11  
License: CC BY 4.0 with a link back

CVE-2026-56303 · Severity: high · CVSS 7.5 · Published 2026-07-11

Capgo, a platform for managing app updates and deployments, contained a security flaw that allowed unauthorized individuals to validate and profile API keys. By exploiting a misconfigured database function, an attacker could confirm if a leaked API key was valid and retrieve sensitive details about its owner, permissions, and expiration. This could lead to unauthorized access to organizational data or the ability to map out a company's internal infrastructure if any API keys were accidentally exposed in logs or code.

Technologies: [Capgo](https://junglewise.ai/threats/technologies/capgo). Vendors: [Capgo](https://junglewise.ai/threats/vendors/capgo).

## Quick answers

**Is CVE-2026-56303 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-56303 being exploited in the wild.

**How severe is CVE-2026-56303?** High severity, with a CVSS score of 7.5, published 11 July 2026.

**Which products and versions are affected?** Capgo < 12.128.2.

**Is there a fix for CVE-2026-56303?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-56303 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-56303?** Check whether you run Capgo at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An information disclosure vulnerability exists in Capgo versions prior to 12.128.2 due to an incorrectly configured PostgreSQL function, 'public.find_apikey_by_value(text)'. The function was marked as SECURITY DEFINER and granted EXECUTE permissions to the 'anon' role, making it accessible via the Supabase RPC endpoint (/rest/v1/rpc/find_apikey_by_value) without authentication. If an attacker provides a valid API key value, the function returns the full row from the 'public.apikeys' table, exposing metadata such as user_id, mode, organization scoping, and expiration dates. This serves as a validation oracle for leaked keys and allows for the enumeration of internal account relationships. The issue was resolved in version 12.128.2 by restricting function execution.

## Affected products

- Capgo Capgo < 12.128.2

## Timeline

- 2026-03-03: advisory: GitHub Security Advisory published
- 2026-07-11: disclosed: NVD publication date

## References

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

## Related threats

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- [Capgo information disclosure in SSO check-domain endpoint](https://junglewise.ai/threats/cve-2026-56336-capgo-information-disclosure-in-sso-check-domain-endpoint)
- [Capgo improper authorization in SSO prelink endpoint](https://junglewise.ai/threats/cve-2026-56313-capgo-improper-authorization-in-sso-prelink-endpoint)
- [Capgo insufficient authentication in email change endpoint](https://junglewise.ai/threats/cve-2026-56308-capgo-insufficient-authentication-in-email-change-endpoint)
- [Capgo SQL injection in admin_stats endpoint](https://junglewise.ai/threats/cve-2026-56281-capgo-sql-injection-in-admin-stats-endpoint)