What’s Vulnerable › Vulnerabilities

CVE-2026-56300: Capgo - Unauthenticated API Key Validity and Permission Oracle via RPC Functions

• 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: 2026-06-30 · updated 2026-07-01
• Weakness: CWE-200

Description

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.

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-7r6g-whg3-5mm4
• https://www.vulncheck.com/advisories/capgo-unauthenticated-api-key-validity-and-permission-oracle-via-rpc-functions
• https://github.com/Cap-go/capgo/security/advisories/GHSA-7r6g-whg3-5mm4

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