Answer in brief
CVE-2026-105207 records a Critical severity (CVSS 9.3) vulnerability in ZITADEL before 4.17.3 Account Takeover via External IdP Linking. The current sources do not mark it as known exploited. The current feed maps zitadel/zitadel (generic), zitadel/zitadel (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps zitadel/zitadel (generic), zitadel/zitadel (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| zitadel/zitadelgeneric | >=0 <4.17.3 | 4.17.3 |
| zitadel/zitadelgeneric | >=0 <=4.19.4 | Not reported |
Published upstream
Oct 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 4, 2026
ZITADEL 3.0.0 through 3.4.15 and 4.0.0 before 4.17.3 creates links between user accounts and external identity providers without verifying a primary factor or the caller's permission, including on identify-only Login V2 sessions and via the User Service V2 AddIDPLink endpoint. An unauthenticated attacker knowing a victim's login name can bind their own external IdP identity to the victim's account and then sign in as the victim.
Quoted source text, attributed separately from HOL analysis.