{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-18206 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-18206 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-18206 is a low-severity vulnerability in Redhat Build of Keycloak, published on 31 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-18206 and fix it if it is affected.\n\nWhat it is: CVE-2026-18206 is a low-severity vulnerability in Redhat Build of Keycloak, published on 31 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-18206 in the wild and no public exploit code.\n\nAffected product: Redhat Build of Keycloak. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-18206/ (Markdown: https://insights.sbomify.com/CVE-2026-18206/index.md)","id":"CVE-2026-18206","markdown":"https://insights.sbomify.com/CVE-2026-18206/index.md","name":"CVE-2026-18206","record":{"aliases":["GHSA-2w88-g477-cxmj"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["security_bypass","data_modify"],"network_reachable":"yes","non_default_config":true,"product_category":"Keycloak identity management","requires_auth":"none","summary":"Attackers can bypass client registration restrictions by exploiting improper wildcard domain validation in Keycloak, allowing unauthorized client modifications.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"build_of_keycloak","vendor":"redhat"}],"cvss":{"score":3.7,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"A flaw was found in the keycloak-services component of Keycloak, which provides identity and access management services. The issue occurs when a realm administrator uses a wildcard domain (like *.example.com) to restrict which hosts can register or update clients. Due to improper validation, the system accepts any hostname that ends with the specified domain suffix, even if it is not a legitimate subdomain. An attacker who can control the reverse DNS of their connection can bypass these host-based restrictions, potentially allowing unauthorized client modifications.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Keycloak-services: keycloak-services: client policy source-host wildcard domain matching bypass","id":"CVE-2026-18206","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"redhat:build_of_keycloak","products":["redhat:build_of_keycloak"],"type":"security_feature_bypass","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Keycloak-services: keycloak-services: client policy source-group condition bypass via duplicate group name matching","id":"CVE-2026-18207"},"packages":[],"prev":{"headline":"XSS in Ticimax Informatics' Ticimax E-Commerce Platform","id":"CVE-2026-18205"},"products":["Red Hat Build of Keycloak","Red Hat Data Grid 8","Red Hat JBoss Enterprise Application Platform Expansion Pack","Red Hat Single Sign-On 7"],"published":"2026-07-31","related":[{"cvss_score":8.8,"headline":"Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows privilege escalation","id":"CVE-2026-15572","kev_date_added":null,"published":"2026-08-05"},{"cvss_score":8.8,"headline":"Keycloak SAML Broken has Authentication Bypass by Primary Weakness","id":"CVE-2026-3047","kev_date_added":null,"published":"2026-03-05"},{"cvss_score":8.1,"headline":"Keycloak-services: keycloak-services: authorization bypass via unnormalized uri matching in pathmatcher","id":"CVE-2026-15573","kev_date_added":null,"published":"2026-08-05"},{"cvss_score":8.1,"headline":"Keycloak-services: keycloak-services: default dcr policy allows role forgery via user property mappers","id":"CVE-2026-16102","kev_date_added":null,"published":"2026-08-05"},{"cvss_score":8.1,"headline":"Org.keycloak/keycloak-quarkus-server: keycloak: unauthorized access via jwt authorization grant with disabled users","id":"CVE-2026-1609","kev_date_added":null,"published":"2026-07-16"},{"cvss_score":8.1,"headline":"Org.keycloak:keycloak-services: keycloak: authentication bypass via jwt algorithm confusion","id":"CVE-2026-11800","kev_date_added":null,"published":"2026-06-25"},{"cvss_score":8.1,"headline":"Keycloak-policy-enforcer: keycloak policy enforcer: authorization bypass via incorrect uri comparison","id":"CVE-2026-9800","kev_date_added":null,"published":"2026-06-25"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-31","vendors":["Red Hat"]},"summary":"Attackers can bypass client registration restrictions by exploiting improper wildcard domain validation in Keycloak, allowing unauthorized client modifications.","url":"https://insights.sbomify.com/CVE-2026-18206/"}