CVE-2026-105208
ZITADEL before 4.17.3 Session Hijacking via Forgeable IdP Intent Tokens
- State
- Published
- Severity
- 8.7 High
- Published
- Oct 4, 2026
- Updated
- Oct 29, 2026
- Reserved
- Oct 4, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N | VulnCheck |
| 3.1 | 7.7 High | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-649 Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking
Affected Products
| Product | Versions |
|---|---|
zitadelzitadel |
|
zitadelzitadel |
|
References
- GitHub Security Advisory (GHSA-jh3m-cr2x-qp88)vendor-advisory
- VulnCheck Advisory: ZITADEL before 4.17.3 Session Hijacking via Forgeable IdP Intent Tokensthird-party-advisory
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