CVE-2026-939039.4CriticalCWE-174

CVE-2026-93903: litespeedtech LiteSpeed Web Server vulnerability

litespeedtech · LiteSpeed Web Server

Fixed in 6.3.7 · Affected: litespeedtech LiteSpeed Web Server before 6.3.7 · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.3%probability of exploitation in the next 30 days

29th percentile

050100

Higher than 29% of scored CVEs

9.4CriticalCVSS 4.0

LowMediumHighCrit.

DescriptionCVE.org

LiteSpeed Web Server (LSWS) before 6.3.7 build 1 mishandles internal redirect URL validation in a certain "corner case" of %252e%252e double decoding, letting a low-privileged tenant execute code in the context of a different account.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

litespeedtech · LiteSpeed Web Serverbefore 6.3.7 build 1

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Double Decoding of the Same Data · Injection and Smuggling
Vendor: litespeedtech
Published: September 2026
Band: Unlikely (under 1%), September 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-93903 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.