CVE-2026-85676
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.
- Published Sep 4, 2026
- CVSS 5.3 medium
- 0.4% chance of exploitation in the next 30 days (EPSS)