Answer in brief
CVE-2026-3429 records a Medium severity (CVSS 4.2) vulnerability in Keycloak: Improper Access Control Leading to MFA Deletion and Account Takeover in Keycloak Account REST API. The current sources do not mark it as known exploited. The current feed maps org.keycloak:keycloak-services (maven). 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 4.2. 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 org.keycloak:keycloak-services (maven). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| org.keycloak:keycloak-servicesmaven | >=0 | Not reported |
Published upstream
Mar 11, 2026
Evidence: source:nvd:source_dates:source-dates:recordSource modified
Aug 26, 2026
Evidence: source:nvd:source_dates:source-dates:recordFirst seen by HOL
Aug 19, 2026
A flaw was identified in the Account REST API of Keycloak that allows a user authenticated at a lower security level to perform sensitive actions intended only for higher-assurance sessions. Specifically, an attacker who has already obtained a victim’s password can delete the victim’s registered MFA/OTP credential without first proving possession of that factor. The attacker can then register their own MFA device, effectively taking full control of the account. This weakness undermines the intended protection provided by multi-factor authentication.
Quoted source text, attributed separately from HOL analysis.