Critical severity · published Sep 30, 2026
CVE-2026-93903
LiteSpeed Web Server (LSWS) before 6.3.7 build 1 mishandles internal redirect URL validation in a certain "corner case."
9.4
CVSS
0.3%
EPSS
No
On KEV
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LW
LiteSpeed Web Server · litespeedtech
before 6.3.7 build 1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-93903
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-93903
www.litespeedtech.com
https://www.litespeedtech.com/products/litespeed-web-server/release-log
docs.litespeedtech.com
https://docs.litespeedtech.com/lsws/changelog/#v6-3-7-build-1
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