CVE-2026-56249: high-severity vulnerability in Capgo
Capgo - Unauthorized Channel Overwrite and Ownership Takeover via POST /channel Name Collision
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.2epss 0.4%
Capgo before 12.128.2 contains an authorization bypass vulnerability in the channel creation endpoint that allows authenticated users to overwrite existing channels by reusing their names. Attackers with app.create_channel permission can exploit a logic mismatch between existence validation and upsert operations to reassign channel ownership and modify critical production channel configurations.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N
Affected products
Capgo · CapgoRelated CVEs — Capgo
In the same product, most dangerous first.
CVE-2026-56299MEDIUMCapgo - Denial of Service via Unauthenticated OPTIONS Request to /build/upload EndpointEPSS 0.7%CVE-2026-56323HIGHCapgo - Unauthenticated Channel Enumeration and App Oracle via GET /channel_selfEPSS 0.6%CVE-2026-56233HIGHCapgo - SSRF and Privilege Escalation via Path Traversal in Builder Upload ProxyEPSS 0.6%CVE-2026-56286HIGHCapgo - Account Deletion Without Password ConfirmationEPSS 0.5%CVE-2026-56222HIGHCapgo - Cross-Organization App Takeover via Mismatched org_id and app_id in /private/role_bindingsEPSS 0.5%CVE-2026-56237CRITICALCapgo - Unauthenticated API Key Generation via Client-Side Parameter ManipulationEPSS 0.5%