Vulnerability · Published Jun 21, 2026 · Assigned by VulnCheck

CVE-2026-56242Capgo - Unauthenticated API Key Validity Oracle and User Identity Disclosure via get_identity_apikey_only RPC

High 7.5

In plain English

A high-severity information exposure in Capgo from Capgo. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.4%top 61.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Capgo before 12.128.2 contains an unauthenticated security definer RPC function get_identity_apikey_only that returns the owning user_id for supplied API keys, creating an API key validity oracle and user identity disclosure primitive. Attackers can call this endpoint with valid or invalid API keys to confirm key validity and map keys to user identifiers, then chain results into other exposed RPCs like get_orgs_v6 to retrieve organization membership and management email PII.

Affected products (as reported)

Vendor	Product	Versions
Capgo	Capgo	0 – before 12.128.2

Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

GHSA Advisory GHSA-fhgj-7376-qxwx vendor-advisory
VulnCheck Advisory: Capgo - Unauthenticated API Key Validity Oracle and User Identity Disclosure via get_identity_apikey_only RPC third-party-advisory