CVE-2023-6563
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2023
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Keycloak: offline session token dos
An unconstrained memory consumption vulnerability was discovered in Keycloak. It can be triggered in environments which have millions of offline tokens (> 500,000 users with each having at least 2 saved sessions). If an attacker creates two or more user sessions and then open the "consents" tab of the admin User Interface, the UI attempts to load a huge number of offline client sessions leading to excessive memory and CPU consumption which could potentially crash the entire system.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Red Hat Single Sign-On 7.6 for RHEL 7
- Vendor
- Red Hat
- Product
- Red Hat Single Sign-On 7.6 for RHEL 7
- Platforms
- Unknown
- Default status
affected- Package
- rh-sso7-keycloak
- Package collection
- https://access.redhat.com/downloads/content/package-browser/
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 0:18.0.11-2.redhat_00003.1.el7sso | unaffected | rpm | * | Unavailable | None listed |
Red Hat Single Sign-On 7.6 for RHEL 8
- Vendor
- Red Hat
- Product
- Red Hat Single Sign-On 7.6 for RHEL 8
- Platforms
- Unknown
- Default status
affected- Package
- rh-sso7-keycloak
- Package collection
- https://access.redhat.com/downloads/content/package-browser/
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 0:18.0.11-2.redhat_00003.1.el8sso | unaffected | rpm | * | Unavailable | None listed |
Red Hat Single Sign-On 7.6 for RHEL 9
- Vendor
- Red Hat
- Product
- Red Hat Single Sign-On 7.6 for RHEL 9
- Platforms
- Unknown
- Default status
affected- Package
- rh-sso7-keycloak
- Package collection
- https://access.redhat.com/downloads/content/package-browser/
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 0:18.0.11-2.redhat_00003.1.el9sso | unaffected | rpm | * | Unavailable | None listed |
RHEL-8 based Middleware Containers
- Vendor
- Red Hat
- Product
- RHEL-8 based Middleware Containers
- Platforms
- Unknown
- Default status
affected- Package
- rh-sso-7/sso76-openshift-rhel8
- Package collection
- https://catalog.redhat.com/software/containers/
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 7.6-38 | unaffected | rpm | * | Unavailable | None listed |
RHEL-8 based Middleware Containers
- Vendor
- Red Hat
- Product
- RHEL-8 based Middleware Containers
- Platforms
- Unknown
- Default status
affected- Package
- rh-sso-7/sso7-rhel8-operator-bundle
- Package collection
- https://catalog.redhat.com/software/containers/
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 7.6.6-2 | unaffected | rpm | * | Unavailable | None listed |
Single Sign-On 7.6.6
- Vendor
- Red Hat
- Product
- Single Sign-On 7.6.6
- Platforms
- Unknown
- Default status
unaffected- Package
- rh-sso7-keycloak
- Package collection
- https://access.redhat.com/jbossnetwork/restricted/listSoftware.html
No explicit version tuples; consult this entry's default status.
Red Hat Build of Keycloak
- Vendor
- Red Hat
- Product
- Red Hat Build of Keycloak
- Platforms
- Unknown
- Default status
unaffected- Package
- keycloak-core
- Package collection
- https://access.redhat.com/downloads/content/package-browser/
No explicit version tuples; consult this entry's default status.