What’s Vulnerable › Vulnerabilities

CVE-2026-56335: Capgo - Channel Configuration Mutation via Write-Scoped API Keys

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-10 · updated 2026-10-25
• Weakness: CWE-284

Description

Capgo before 12.128.2 contains an authorization bypass vulnerability where write-scoped API keys can directly mutate protected channel configuration fields through PostgREST by exploiting a null authentication check in the immutability trigger. Attackers with write API keys can modify sensitive channel attributes such as public, allow_emulator, and security-related flags outside intended application routes.

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-ph9c-vwjq-pqhj
• https://www.vulncheck.com/advisories/capgo-channel-configuration-mutation-via-write-scoped-api-keys
• https://github.com/Cap-go/capgo/security/advisories/GHSA-ph9c-vwjq-pqhj

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