Information disclosure in Capgo
CVE-2026-56300
Capgo before 12.128.2 contains unauthenticated security definer RPC functions get_user_id and get_org_perm_for_apikey that expose API key validity oracles and user UUID disclosure. Unauthenticated attackers using the public API key can validate leaked keys, enumerate users and apps, and determine permission levels, significantly increasing the actionability of compromised credentials.
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: 0.005 (37.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Capgo — versions 0, 12.128.2
Weakness classification (CWE)
References
- github.com/Cap-go/capgo/security/advisories/GHSA-7r6g-whg3-5mm4 (vendor-advisory)
- www.vulncheck.com/advisories/capgo-unauthenticated-api-key-validity-and-permiss… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56300?
- CVE-2026-56300 is a high-severity vulnerability in Capgo, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-06-30.
- How severe is CVE-2026-56300?
- High severity. CVSS v3 base score is 7.5 out of 10.