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CVE-2023-1664

20
FAUCET Score

CVE-2023-1664 is a flaw in Keycloak, affecting Red Hat Keycloak, JBoss A-MQ, and other related products, that allows an attacker to bypass client certificate validation under specific non-default configurations. The vulnerability has a CVSS score of 6.5 (Medium) due to its network attack vector and low attack complexity, potentially impacting the confidentiality and integrity of consumer applications if the reverse proxy doesn't validate certificates and the Keycloak truststore is misconfigured. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:redhat:build_of_quarkus:-:*:*:*:*:*:*:*
7CPE matchmatch criteria
cpe:2.3:a:redhat:jboss_a-mq:7:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:redhat:keycloak:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:redhat:migration_toolkit_for_runtimes:-:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.43%
Probability of exploitation in next 30 days
EPSS Percentile
34.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0043 is in the 22nd percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (12)

mavenpatch availablevia ghsa
Product: org.keycloak:keycloak-coreFixed in: 21.1.2
redhatpatch availablevia redhat_api
Product: AMQ Broker 7.11.2Fixed in: keycloak-core
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Single Sign-On 7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Single Sign-On 7.6 for RHEL 7Fixed in: rh-sso7-keycloak-0:18.0.8-1.redhat_00001.1.el7sso
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Single Sign-On 7.6 for RHEL 8Fixed in: rh-sso7-keycloak-0:18.0.8-1.redhat_00001.1.el8sso
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Single Sign-On 7.6 for RHEL 9Fixed in: rh-sso7-keycloak-0:18.0.8-1.redhat_00001.1.el9sso
View patch
redhatpatch availablevia redhat_api
Product: RHEL-8 based Middleware ContainersFixed in: rh-sso-7/sso76-openshift-rhel8:7.6-24
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Fuse 7Fixed in: keycloak-core
redhatvendor investigatingvia redhat_api
Product: Red Hat build of Apicurio Registry 2Fixed in: keycloak-core
redhatvendor investigatingvia redhat_api
Product: Red Hat build of QuarkusFixed in: org.keycloak/keycloak-core
redhatvendor investigatingvia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Migration Toolkit for RuntimesFixed in: org.keycloak-keycloak-core

Vendor Advisories (2)

mavenGHSA-5cc8-pgp5-7mpmmedium

Keycloak Untrusted Certificate Validation vulnerability

Jun 30, 2023
redhatCVE-2023-1664Low

keycloak: Untrusted Certificate Validation

Mar 27, 2023

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingVendor Advisory