{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-89058 exists.","fix":"Apply the vendor's patch.","what":"CVE-2026-89058 is a high-severity vulnerability in Red Hat Build of Keycloak, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-89058 and fix it if it is affected.\n\nWhat it is: CVE-2026-89058 is a high-severity vulnerability in Red Hat Build of Keycloak, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-89058 exists.\n\nAffected product: Red Hat 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-2026-89058/ (Markdown: https://insights.sbomify.com/CVE-2026-89058/index.md)","id":"CVE-2026-89058","markdown":"https://insights.sbomify.com/CVE-2026-89058/index.md","name":"CVE-2026-89058","record":{"aliases":["CLEANSTART-2026-KS26010","CLEANSTART-2026-ZN77220","DEBIAN-CVE-2026-89058","GHSA-972r-f3fv-whm3","OESA-2026-4304","OESA-2026-4305","OESA-2026-4306","OESA-2026-4307","UBUNTU-CVE-2026-89058"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"RESTEasy CORS filter","requires_auth":"none","summary":"RESTEasy's CorsFilter reflects arbitrary origins with credentials when configured with wildcard, allowing malicious sites to read authenticated responses.","user_interaction":"required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[],"cvss":{"score":7.4,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-942","name":"Permissive Cross-domain Security Policy with Untrusted Domains"},{"id":"CWE-346","name":"Origin Validation Error"}],"description":"A flaw was found in RESTEasy's CorsFilter, which, when configured to allow all origins (\"*\"), reflects the request's Origin header back in the Access-Control-Allow-Origin response together with Access-Control-Allow-Credentials: true. This permissive cross-origin policy allows a malicious website to make credentialed cross-origin requests and read authenticated responses from a victim's session, resulting in a loss of confidentiality.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Resteasy-core: resteasy: corsfilter reflects arbitrary origin with credentials under wildcard config","id":"CVE-2026-89058","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"other","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"Resteasy-core: resteasy: iioimageprovider unbounded image decode (decompression-bomb dos)","id":"CVE-2026-89059"},"packages":[],"prev":{"headline":"Auth bypass in Idea Tab Pro (TB373FU)","id":"CVE-2026-89057"},"products":["Red Hat Build of Keycloak","Red Hat Certificate System 10","Red Hat Certificate System 11","Red Hat Enterprise Linux 10","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 9","Red Hat Fuse 7","Red Hat JBoss Enterprise Application Platform 7","Red Hat JBoss Enterprise Application Platform 8","Red Hat JBoss Enterprise Application Platform Expansion Pack","Red Hat Satellite 6","Red Hat Single Sign-On 7","Red Hat build of Apache Camel 4 for Quarkus 3","Red Hat build of Apicurio Registry 3","Red Hat build of Debezium 3","Red Hat build of Quarkus 3.27.6.redhat","Red Hat build of Quarkus 3.33.4.redhat"],"published":"2026-09-18","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-29","vendors":["Red Hat"]},"summary":"RESTEasy's CorsFilter reflects arbitrary origins with credentials when configured with wildcard, allowing malicious sites to read authenticated responses.","url":"https://insights.sbomify.com/CVE-2026-89058/"}