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CVE-2026-93903

Quick assessment

Affected
litespeedtech LiteSpeed Web Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LiteSpeed Web Server（LSWS）在 6.3.7 build 1 之前的版本中，对内部重定向 URL 的验证处理存在缺陷，特别是在某些“边缘情况”下。

CVSS 9.4 · Critical EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
litespeedtech LiteSpeed Web Server < 6.3.7 build 1 affected
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I. Basic Information for CVE-2026-93903

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
LiteSpeed Web Server (LSWS) before 6.3.7 build 1 mishandles internal redirect URL validation in a certain "corner case."
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
对同一数据的双重编码
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
litespeedtech LiteSpeed Web Server 0 ~ 6.3.7 build 1 -

II. Public POCs for CVE-2026-93903

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-93903

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Vendor Pages for CVE-2026-93903 (2)

IV. Related Vulnerabilities

Same vendor: litespeedtech
Same weakness: CWE-174

V. Comments for CVE-2026-93903

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