Vulnerability · Published Jul 10, 2026 · Assigned by GitHub_M

CVE-2026-56667ZITADEL: Stored XSS via Default URI Redirect in Login V2

High 7.3

In plain English

A high-severity cross-site scripting in zitadel from zitadel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).

Severity (CVSS 3.1)7.3High

Exploit odds (30 days)0.4%top 67.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

ZITADEL is an open source identity management platform. Prior to 4.15.3, ZITADEL Login V2 OIDC and SAML FailedPrecondition error paths return loginSettings.defaultRedirectUri to router.push without applying the isSafeRedirectUri check, allowing an organization or instance administrator to store a javascript or data URI that can execute in a user's browser when an affected login error path is reached. This issue is fixed in version 4.15.3.

Affected products (as reported)

Vendor	Product	Versions
zitadel	zitadel	< 4.15.3

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N

References

https://github.com/zitadel/zitadel/security/advisories/GHSA-5wcj-9wj4-j65h x_refsource_CONFIRM
https://github.com/zitadel/zitadel/commit/038265925a3b05ac1df8aad461ab071983e9eb85 x_refsource_MISC
https://github.com/zitadel/zitadel/releases/tag/v4.15.3 x_refsource_MISC