{"id":"CVE-2026-82287","summary":"Rybbit Reflects Any Origin in CORS Responses While Allowing Credentials","details":"Rybbit before 2.7.0 contains a CORS misconfiguration vulnerability that allows attackers to bypass origin restrictions by reflecting any request origin in Access-Control-Allow-Origin responses while credentials are enabled. Attackers can issue credentialed cross-origin requests from any website to read analytics data, account information, and perform authenticated state-changing operations as the victim user.","modified":"2026-09-02T03:30:37.812233796Z","published":"2026-08-28T16:19:05.231Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-942"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82287.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82287.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82287"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/rybbit-reflects-any-origin-in-cors-responses-while-allowing-credentials"},{"type":"REPORT","url":"https://github.com/rybbit-io/rybbit/issues/1038"},{"type":"FIX","url":"https://github.com/rybbit-io/rybbit/commit/6f1039bdd3328a84d6700031bc0ce4714020e2f9"},{"type":"PACKAGE","url":"https://github.com/rybbit-io/rybbit"},{"type":"ARTICLE","url":"https://github.com/rybbit-io/rybbit/blob/v2.6.0/server/src/index.ts"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rybbit-io/rybbit","events":[{"introduced":"0"},{"fixed":"17392d73df4e9aa19a2486446921cfd307041dec"},{"fixed":"6f1039bdd3328a84d6700031bc0ce4714020e2f9"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.7.0"}],"source":["DESCRIPTION","REFERENCES"]}}],"versions":["v2.6.1","v2.6.0","v2.5.0","v2.4.0","v2.3.1","v2.3.0","v2.2.4","v2.2.3","v2.2.2","v2.2.1","v2.2.0","v2.1.1","v2.0.1","v2.0.0","v1.7.0","v1.6.1","v1.6.0","v1.5.1","v1.5.0","v1.4.1","v1.4.0","v1.3.0","v1.2.0","v1.1.0","v1.0.0","v0.4.2","v0.4.1","v0.4.0","v0.3.1","v0.3.0","v0.2.0","v0.1.4","v0.1.3","v0.1.2","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-82287.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"}]}