CVE-2026-100390 Zoraxy 3.2.3 through 3.3.4 Client IP Spoofing via X-Forwarded-For IPv6
Attackers can spoof source IPs via IPv6 headers to bypass IP-based access controls in Zoraxy reverse proxy.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-100390?
CVE-2026-100390 is a critical authentication bypass vulnerability in tobychui zoraxy, published on 25 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Zoraxy versions 3.2.3 through 3.3.4 fail to properly parse IPv6 addresses in the RemoteAddr field when setting forwarded headers. Unauthenticated attackers connecting over IPv6 can supply arbitrary X-Forwarded-For values to spoof their source IP and bypass authorization provider IP-based access controls.
Weakness: CWE-290
Which versions are affected by CVE-2026-100390?
How do I fix CVE-2026-100390?
No fix has been published for CVE-2026-100390 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-100390 being exploited?
There is no known exploitation of CVE-2026-100390 in the wild and no public exploit code.
Sources
Also known as GHSA-7crf-73jx-vf27.