VULNERABILITY INTELLIGENCE
CVE-2026-55671
EPSS probability0.41%
CISA KEVNot currently listed
Published2026-07-10
Last modified2026-07-14
Description
ZITADEL is an open source identity management platform. From 4.0.0-rc.1 through 4.15.1, ZITADEL's HTTP notification channels, OIDC BackChannel Logout, and SAML metadata URL fetches do not consistently validate user-defined URLs against protected denylist handling, allowing server-side requests to loopback, internal IP, link-local, or redirected endpoints through DNS rebinding, redirects, or protocol downgrades. This issue is fixed in version 4.15.2.
Weakness classification
- security-advisories@github.com: CWE-918