CVSS 3.1
4.8 mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:NCVE-2026-56666
Medium (4.8). EPSS 0.3% chance of exploitation in the next 30 days. Fixed in github.com/zitadel/zitadel 4.15.3.
ZITADEL is an open source identity management platform. Prior to 4.15.3, ZITADEL's external identity provider handler checks that the local user's email is verified but does not verify that the external IdP confirmed ownership of the same email before auto-linking by email, allowing a permissive provider account with a victim email address to be linked to the victim's local account. This issue is fixed in version 4.15.3.
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 21% of CVEs (scores of 2026-10-31)
- CWE
- CWE-287
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-992q-9gwp-7r79 | Go | github.com/zitadel/zitadel | <4.15.3 | 4.15.3 |
| GO-2026-6470 | Go | github.com/zitadel/zitadel | all versions | no fix published |