CVE-2026-45566 Roxy-WI: Open redirect on /login?next= via basic-auth userinfo syntax bypass
Attackers can redirect users to malicious sites via a bypass in the login redirect validation, potentially facilitating phishing attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-45566?
CVE-2026-45566 is a medium-severity vulnerability in roxy-wi, published on 10 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Roxy-WI is a web interface for managing Haproxy, Nginx, Apache and Keepalived servers. In versions 8.2.6.4 and prior, the login flow allow-lists next URLs by rejecting strings containing https:// or http:// substrings, then constructs https://{request.host}{next_url} and the JS client redirects via window.location.replace(). The block does not consider the userinfo@host syntax. [email protected]/path produces https://[email protected]/path, which all modern browsers route to evil.example. At time of publication, there are no publicly available patches.
Weakness: CWE-601
Which versions are affected by CVE-2026-45566?
How do I fix CVE-2026-45566?
No fix has been published for CVE-2026-45566 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-45566 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-45566 exists.
Sources
Also known as GHSA-xw9x-68gg-mp5h.