CVE-2026-105208 ZITADEL - Broken Access Control

ZITADEL 4.x < 4.17.3 and 3.x <= 3.4.15 contain a broken access control vulnerability caused by unauthenticated, malleable encryption of IdP intent tokens, letting authenticated users tamper tokens to hijack other users' external login intents, exploit requires predicting victim's intent identifier and winning a timing race.

CVSS base score 7.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.08% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Broken Access Control
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Published
4 October 2026
Updated
15 October 2026
Weakness
CWE-649

Vendor fix

Upgrade to version 4.17.3 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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