# CVE-2026-85676

## Summary

- **CVE ID:** CVE-2026-85676
- **Severity:** MEDIUM
- **CVSS Score:** 5.3 (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)
- **CWE:** CWE-601
- **Published:** Sep 4, 2026
- **Last Modified:** Sep 4, 2026

## 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.

## Affected Products

- dubinc — dub (0)

## References

- [CNA](https://github.com/dubinc/dub/issues/4337)
- [CNA](https://github.com/dubinc/dub)
- [CNA](https://github.com/dubinc/dub/blob/73415cf5e6be13ce9adb7ba5e97474307db34a17/apps/web/lib/middleware/utils/get-final-url.ts)
- [CNA](https://www.vulncheck.com/advisories/dub-open-redirect-via-unrestricted-redir-url-parameter)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.24%
- **EPSS Percentile:** 15.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._