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CVE-2026-88770

Keycloak-services: keycloak-services: device authorization grant issues tokens to brute-force-locked accounts

Published: Sep 10, 2026Updated: Sep 10, 2026 Sources: CVE List NVDCWE-307
6.5MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 88.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only
Self-Check
Not available

Description

A flaw was found in the Device Authorization Grant flow of Keycloak, an identity and access management solution. The issue occurs because the token redemption process fails to check if a user account is currently locked due to brute-force protection. If an attacker has an active session for a locked account, they can complete the device login process and receive new security tokens. This allows the attacker to maintain access to the account even when it should be temporarily disabled to prevent unauthorized entry.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-307

Affected Products

Red Hat
commercial·US
Red Hat Build of Keycloak
Web & CMS Plugins
Red Hat Single Sign-On 7On-premSecurity Product
Security Products / identity-access-mgmt

Exploitability

Workaround Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Credential Access
View detailed technique mapping

References

https://access.redhat.com/security/cve/CVE-2026-88770
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2531302
bugzilla.redhat.com

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