CVE-2026-56249

Description

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 Vector

References

• https://github.com/Cap-go/capgo/security/advisories/GHSA-vj24-j594-3wv3
• https://www.vulncheck.com/advisories/capgo-unauthorized-channel-overwrite-and-ownership-takeover-via-post-channel-name-collision
• https://github.com/Cap-go/capgo/security/advisories/GHSA-vj24-j594-3wv3