{"answers":{"affected":"2 open source packages ship an affected version, including org.keycloak:keycloak-model-jpa. It affects 5 products.","exploited":"There is no known exploitation of CVE-2023-6563 in the wild and no public exploit code.","fix":"Upgrade org.keycloak:keycloak-model-jpa to 21.0.0 or later.","what":"CVE-2023-6563 is a high-severity denial of service vulnerability in Redhat Keycloak, published on 14 Dec 2023. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-6563 and fix it if it is affected.\n\nWhat it is: CVE-2023-6563 is a high-severity denial of service vulnerability in Redhat Keycloak, published on 14 Dec 2023. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-6563 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.keycloak:keycloak-model-jpa (Maven): affected all versions; fixed in 21.0.0\n- org.keycloak:keycloak-model-jpa (Maven): affected all versions; fixed in 21.0.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2023-6563/ (Markdown: https://insights.sbomify.com/CVE-2023-6563/index.md)","id":"CVE-2023-6563","markdown":"https://insights.sbomify.com/CVE-2023-6563/index.md","name":"CVE-2023-6563","record":{"aliases":["GHSA-54f3-c6hg-865h"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Keycloak identity server","requires_auth":"low_privilege","summary":"An attacker can cause a denial of service by triggering excessive memory consumption in Keycloak when loading offline sessions in the admin UI.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"keycloak","vendor":"redhat"},{"product":"openshift_container_platform","vendor":"redhat"},{"product":"openshift_container_platform_for_ibm_linuxone","vendor":"redhat"},{"product":"openshift_container_platform_for_power","vendor":"redhat"},{"product":"single_sign-on","vendor":"redhat"}],"cvss":{"score":7.7,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"An unconstrained memory consumption vulnerability was discovered in Keycloak. It can be triggered in environments which have millions of offline tokens (\u003e 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.","ecosystems":["Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Keycloak: offline session token dos","id":"CVE-2023-6563","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"redhat:keycloak","products":["redhat:keycloak","redhat:openshift_container_platform","redhat:single_sign-on"],"type":"denial_of_service","year":"2023"},"n_packages":2,"n_references":8,"next":{"headline":"Incorrect Authorization in GitLab","id":"CVE-2023-6564"},"packages":[{"ecosystem":"Maven","fixed":["21.0.0"],"introduced":["0"],"last_affected":[],"package":"org.keycloak:keycloak-model-jpa","purl":null,"source":"GHSA-54f3-c6hg-865h"},{"ecosystem":"Maven","fixed":["21.0.0"],"introduced":["0"],"last_affected":[],"package":"org.keycloak:keycloak-model-jpa","purl":"pkg:maven/org.keycloak/keycloak-model-jpa","source":"GHSA-54f3-c6hg-865h"}],"prev":{"headline":"Path traversal in Kakadu SDK","id":"CVE-2023-6562"},"products":["RHEL-8 based Middleware Containers","Red Hat Build of Keycloak","Red Hat Single Sign-On 7.6 for RHEL 7","Red Hat Single Sign-On 7.6 for RHEL 8","Red Hat Single Sign-On 7.6 for RHEL 9","Single Sign-On 7.6.6"],"published":"2023-12-14","related":[{"cvss_score":10,"headline":"Keycloak vulnerable to cross-site scripting when validating URI-schemes on SAML and OIDC","id":"CVE-2022-4361","kev_date_added":null,"published":"2023-07-07"},{"cvss_score":9.8,"headline":"Keycloak vulnerable to privilege escalation on Token Exchange feature","id":"CVE-2022-1245","kev_date_added":null,"published":"2022-07-07"},{"cvss_score":9.6,"headline":"keycloak Self Stored Cross-site Scripting vulnerability","id":"CVE-2021-20195","kev_date_added":null,"published":"2021-05-28"},{"cvss_score":9.3,"headline":"Keycloak Authentication Error","id":"CVE-2019-14910","kev_date_added":null,"published":"2019-12-05"},{"cvss_score":9.3,"headline":"Keycloak Authentication Error","id":"CVE-2019-14909","kev_date_added":null,"published":"2019-12-04"},{"cvss_score":9.1,"headline":"Keycloak vulnerable to path traversal via double URL encoding","id":"CVE-2022-3782","kev_date_added":null,"published":"2023-01-11"},{"cvss_score":9.1,"headline":"keycloak vulnerable to unauthorized login via mail server setup","id":"CVE-2019-14837","kev_date_added":null,"published":"2020-01-07"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-09-22","vendors":["Red Hat"]},"summary":"An attacker can cause a denial of service by triggering excessive memory consumption in Keycloak when loading offline sessions in the admin UI.","url":"https://insights.sbomify.com/CVE-2023-6563/"}