CVE-2026-93903 Open redirect in LiteSpeed Web Server
An attacker can exploit mishandled internal redirect URL validation in LiteSpeed Web Server to bypass security controls.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-93903?
CVE-2026-93903 is a critical vulnerability in litespeedtech LiteSpeed Web Server, published on 30 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
LiteSpeed Web Server (LSWS) before 6.3.7 build 1 mishandles internal redirect URL validation in a certain "corner case."
Weakness: CWE-174
Which versions are affected by CVE-2026-93903?
How do I fix CVE-2026-93903?
No fix has been published for CVE-2026-93903 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-93903 being exploited?
There is no known exploitation of CVE-2026-93903 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-8x5w-4247-99g6.