Bug 2533600

Summary: CVE-2026-85676 dub: Dub: Open Redirect Vulnerability via unrestricted redir_url parameter [epel-all]
Product: [Fedora] Fedora EPEL Reporter: Vladimir Vasilev <vvasilev>
Component: dubAssignee: Davide Cavalca <davide>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: epel9CC: davide
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["c73b3bc6-23b7-434f-8c9a-631997f3ae06"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2487042, 2533313    

Description Vladimir Vasilev 2026-09-15 06:36:09 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.
Comment 1 Michel Lind 2026-10-06 13:21:16 UTC 
Reassigning from `epel10` to `epel9`: Bug filed against a branch the package never shipped on.