CVE-2026-49030: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-45wj-jx7r-99h8
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Advisory Summary

CVE-2026-49030 is a security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-49030 at a Glance

CVE Identifier CVE-2026-49030
GHSA Identifier GHSA-45wj-jx7r-99h8
Severity N/A
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-49030

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-2026-49030, 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 General Security Weakness. 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

pathe through 2.0.3 unconditionally normalizes backslash characters to forward slashes on all platforms, including POSIX systems where backslash is a valid filename character. This causes join(), resolve(), and normalize() to interpret backslash-separated dot notation sequences as directory traversal, diverging from Node.js path.posix behavior and enabling path traversal attacks that bypass common input validation in server-side applications. NOTE: the Supplier reports that "the behavior is documented, intentional, and identical in spirit to path.win32."

References

NVD — CVE-2026-49030 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-49030
Software Source Repository REPOSITORY
https://github.com/unjs/pathe/issues/240

Frequently Asked Questions

What is CVE-2026-49030?
CVE-2026-49030 is a security vulnerability in Software classified as a security vulnerability vulnerability under General Security Weakness.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-49030?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-49030?
CVE-2026-49030 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-49030?
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-45wj-jx7r-99h8",
  "modified" : "2026-09-13T21:31:42Z",
  "published" : "2026-09-13T21:31:42Z",
  "aliases" : [ "CVE-2026-49030" ],
  "details" : "pathe through 2.0.3 unconditionally normalizes backslash characters to forward slashes on all platforms, including POSIX systems where backslash is a valid filename character. This causes join(), resolve(), and normalize() to interpret backslash-separated dot notation sequences as directory traversal, diverging from Node.js path.posix behavior and enabling path traversal attacks that bypass common input validation in server-side applications. NOTE: the Supplier reports that \"the behavior is documented, intentional, and identical in spirit to path.win32.\"",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-49030"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/unjs/pathe/issues/240"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-13T21:17:01Z"
  }
}