CVE-2026-85676: URL Redirection to Untrusted Site ('Open Redirect') in dubinc dub
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.
CVE-2026-85676: URL Redirection to Untrusted Site ('Open Redirect') in dubinc dub
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.
CVSS v4.0
Score 5.3medium
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-04T13:32:38.751Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a9adb47acd9273b49bef5c7
Added to database: 09/04/2026, 14:52:55 UTC
Last updated: 09/04/2026, 14:52:55 UTC
Views: 1
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