CVE-2026-55671
Low
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.
SeverityLow
CVSS2.3
Exploit probability—
ProductGithub.com/zitadel/zitadel
PublishedJul 10, 2026
First seenJul 10, 2026
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Update
- github.com/zitadel/zitadel1.80.0-v2.20.0.20260615133614-8e82ec1cb9a2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| github.com/zitadel/zitadelGo | v < 1.80.0-v2.20.0.20260615133614-8e82ec1cb9a2 | 1.80.0-v2.20.0.20260615133614-8e82ec1cb9a2 |
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