CVE-2026-85676
Medium
Description
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.
SeverityMedium
CVSS4.3
Exploit probability—
ProductDub
PublishedSep 4, 2026
First seenSep 4, 2026
Weakness typeCWE-601Open redirect
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| dubinc dub | v ≤ 73415cf5e6be13ce9adb7ba5e97474307db34a17 | — |
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