Low severityNVD Advisory· Published Jul 10, 2026· Updated Jul 14, 2026
CVE-2026-55671
CVE-2026-55671
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/zitadel/zitadelGo | < 1.80.0-v2.20.0.20260615133614-8e82ec1cb9a2 | 1.80.0-v2.20.0.20260615133614-8e82ec1cb9a2 |
Affected products
2- osv-coordsRange: < 0.0.20260723T184607-160000.1.1
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-29jh-8cfq-rr8xghsaADVISORY
- github.com/zitadel/zitadel/commit/8e82ec1cb9a2b154ff48d3a0fa96b43d1428061fghsaWEB
- github.com/zitadel/zitadel/releases/tag/v4.15.2nvdWEB
- github.com/zitadel/zitadel/security/advisories/GHSA-29jh-8cfq-rr8xnvdWEB
- github.com/zitadel/zitadel/commit/b6f78086913b8d916bce9ab2e049ab0d84f947fdnvd
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