{"id":"CVE-2026-85676","summary":"Dub Open Redirect via Unrestricted redir_url Parameter","details":"Dub contains an open redirect vulnerability in the redir_url query parameter that is accepted on every short link without validation or domain allowlist enforcement. Attackers can append the redir_url parameter to any short link to redirect visitors to arbitrary external URLs through the trusted Dub domain, bypassing destination blacklists and potentially enabling phishing attacks with link cloaking enabled.","modified":"2026-10-08T02:53:54.850086051Z","published":"2026-09-04T14:32:29.598Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85676.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-601"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85676.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85676"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/dub-open-redirect-via-unrestricted-redir-url-parameter"},{"type":"REPORT","url":"https://github.com/dubinc/dub/issues/4337"},{"type":"PACKAGE","url":"https://github.com/dubinc/dub"},{"type":"ARTICLE","url":"https://github.com/dubinc/dub/blob/73415cf5e6be13ce9adb7ba5e97474307db34a17/apps/web/lib/middleware/utils/get-final-url.ts"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/dubinc/dub","events":[{"introduced":"0"},{"last_affected":"73415cf5e6be13ce9adb7ba5e97474307db34a17"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85676.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:N/VI:L/VA:N/SC:N/SI:N/SA:N"}]}