CVE-2026-105208 — ZITADEL before 4.17.3 Session Hijacking via Forgeable IdP Intent Tokens
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 tok…
Published: 2026-10-04 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7