Information disclosure in Capgo
CVE-2026-56242
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (36.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Capgo — versions 0, 12.128.2
Weakness classification (CWE)
References
- github.com/Cap-go/capgo/security/advisories/GHSA-fhgj-7376-qxwx (vendor-advisory)
- www.vulncheck.com/advisories/capgo-unauthenticated-api-key-validity-oracle-and-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56242?
- CVE-2026-56242 is a high-severity vulnerability in Capgo, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-06-21.
- How severe is CVE-2026-56242?
- High severity. CVSS v3 base score is 7.5 out of 10.