CVE-2026-105208
ZITADEL before 4.17.3 Session Hijacking via Forgeable IdP Intent Tokens
CVSS Score
7.7
EPSS Score
0.0%
EPSS Percentile
0th
ZITADEL 4.x before 4.17.3 and 3.x through 3.4.15 protects IdP intent tokens with unauthenticated, malleable encryption, allowing authenticated users to tamper with their own token so it is accepted for another user's external login intent. An attacker who predicts a victim's in-flight intent identifier and wins a timing race can call /v2/idp_intents or /v2/sessions to steal the victim's IdP tokens or hijack their session.
| CWE | CWE-649 |
| Vendor | zitadel |
| Product | zitadel |
| Published | Oct 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
zitadel / zitadel
0 < 4.17.3
zitadel / zitadel
0 ≤ 4.19.4
References
Credits
livio-a wim07101993