CVE-2026-93903: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-8x5w-4247-99g6
Share
CWE-174
Published
Advisory Summary

CVE-2026-93903 is a CRITICAL security vulnerability vulnerability (CWE-174: Double Decoding of the Same Data) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product decodes the same input twice, which can limit the effectiveness of any protection mechanism that occurs in between the decoding operations.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-93903 at a Glance

CVE Identifier CVE-2026-93903
GHSA Identifier GHSA-8x5w-4247-99g6
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-174: Double Decoding of the Same Data
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-93903

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-93903, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-174: Double Decoding of the Same Data, where the product decodes the same input twice, which can limit the effectiveness of any protection mechanism that occurs in between the decoding operations. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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

References

NVD — CVE-2026-93903 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-93903
docs.litespeedtech.com/lsws/changelog/ WEB
https://docs.litespeedtech.com/lsws/changelog/#v6-3-7-build-1
www.litespeedtech.com/products/litespeed-... WEB
https://www.litespeedtech.com/products/litespeed-web-server/release-log

Frequently Asked Questions

What is CVE-2026-93903?
CVE-2026-93903 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-174: Double Decoding of the Same Data.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-93903?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-93903?
CVE-2026-93903 is classified under CWE-174: Double Decoding of the Same Data (The product decodes the same input twice, which can limit the effectiveness of any protection mechanism that occurs in between the decoding operations.).
How can I check Maven dependencies for CVE-2026-93903?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-8x5w-4247-99g6",
  "modified" : "2026-09-30T15:31:33Z",
  "published" : "2026-09-30T15:31:33Z",
  "aliases" : [ "CVE-2026-93903" ],
  "details" : "LiteSpeed Web Server (LSWS) before 6.3.7 build 1 mishandles internal redirect URL validation in a certain \"corner case.\"",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-93903"
  }, {
    "type" : "WEB",
    "url" : "https://docs.litespeedtech.com/lsws/changelog/#v6-3-7-build-1"
  }, {
    "type" : "WEB",
    "url" : "https://www.litespeedtech.com/products/litespeed-web-server/release-log"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-174" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-30T14:17:37Z"
  }
}