Vulnerability record/PUBLISHED/Published Oct 29, 2026 06:22:11 UTC
CVE-2026-117859
A flaw was found in the Pushed Authorization Request PAR implementation of the keycloak-services component. The issue occurs when an authentication flow is restarted, which incorrectly clears the internal markers used to track PAR consumption while leaving the request active. This allows an attacker to reuse the same authorization request to obtain multiple access tokens, bypassing security requirements for single-use requests.
Base score5.4/ 10
SeverityMediumCVSS 3.1
Exploitability / impact
CVSS metric breakdown
Base severityMedium
Attack vectorNetworkAV
Attack complexityLowAC
Privileges requiredLowPR
User interactionNoneUI
ScopeUnchangedS
Confidentiality impactLowC
Integrity impactLowI
Availability impactNoneA
CVSS vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:NCVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.
Record context
CVE Numbering Authorityredhat
Last updatedOct 29, 2026 06:22:11 UTC
PublishedOct 29, 2026 06:22:11 UTC
ReservedOct 27, 2026 14:02:45 UTC
Credits
- Red Hat would like to thank Ahmed Hesham Salah (SecuriCIP) for reporting this issue.