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🟠 Keycloak, Improper Input Validation, #CVE-2021-3754 (Medium) Just Updated -DC-Oct2026-3306 https://dailycve.com/keycloak-improper-input-validation-cve-2021-3754-medium-just-updated-dc-oct2026-3306/
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CVE-2021-3754(redhat / keycloak)
LOWCVSS 5.3 · MEDIUMSignal is active with 1 mentions in latest observed window
Immediate actions
- Track advisory updates for patch or workaround availability
Recommended action window: Monitor and triage in normal cycle
NVD description
A flaw was found in keycloak where an attacker is able to register himself with the username same as the email ID of any existing user. This may cause trouble in getting password recovery email in case the user forgets the password.
0.0/ 10 priority
Sources & remediation
Vendor / third-party advisories
Weakness type (CWE)
CWE-20
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
Are you affected?
If you run products in this scope, you should treat this CVE as relevant to your environment.
- keycloak
- single_sign-on
Threat summary
- 1 mentions across 1 observed day
What's happening
- 1 total mentions across 1 day
Affected systems
Vendors
Products
keycloaksingle_sign-on
2 versions affected across 2 products
Deep dive
Activity timeline1 mentions / 1d
Referenced assets1 URL
Full discourse1 post
CPE platform detail2 entries
2 of 2 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | redhat | keycloak | - | - | - |
| App | redhat | single_sign-on | 7.0 | - | - |