CVE-2026-55671CWE-918

ZITADEL: Server-Side Request Forgery (SSRF) and Denylist Bypass in Outgoing HTTP Components

Low · published July 10, 2026

CVSS v4.0
2.3
EPSS
0%
Percentile
34.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
2.3 · LOW
Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00414 · 34.6th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-07-10T17:17Z
EPSS history
Timeline
  • 10 JUL 17:17Z
    ZITADEL: Server-Side Request Forgery (SSRF) and Denylist Bypass in Outgoing HTTP Components
    cvelistv5