What’s Vulnerable › Vulnerabilities

CVE-2026-93903

• Severity: critical (CVSS 9.4 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-30 · updated 2026-10-29
• Weakness: CWE-174

Description

LiteSpeed Web Server (LSWS) before 6.3.7 build 1 mishandles internal redirect URL validation in a certain "corner case."

Affected products

• LiteSpeed Technologies LiteSpeed Web Server: before 6.3.7 build 1 — fixed in 6.3.7 build 1

How to fix

Upgrade to a fixed version: LiteSpeed Technologies LiteSpeed Web Server 6.3.7 build 1. Check the vendor advisory for mitigations.

References

• https://docs.litespeedtech.com/lsws/changelog/#v6-3-7-build-1
• https://github.com/Tautvydas-Aleliunas/CVE-2026-93903
• https://www.litespeedtech.com/products/litespeed-web-server/release-log

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