moment up to 2.30.1 Locale moment.locale path traversal

Summaryinfo

A vulnerability was found in moment up to 2.30.1. It has been classified as problematic. The impacted element is the function moment.locale of the component Locale. This manipulation causes path traversal. The identification of this vulnerability is CVE-2026-17495. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in moment up to 2.30.1 and classified as problematic. Affected by this vulnerability is the function moment.locale of the component Locale. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect integrity. The summary by CVE is:

moment is a JavaScript date library for parsing, validating, manipulating, and formatting dates. In versions 2.29.2 through 2.30.1, a specially crafted non-string object passed to moment.locale() can bypass the locale-name path-traversal guard. The guard assumes the input is a string, so an object whose match() method satisfies the check while its toString() returns a traversal path reaches an internal require() call with attacker-controlled path segments. This is an incomplete fix for CVE-2022-24785 and primarily affects npm (server-side) users that pass user-provided input directly to moment.locale(). The issue is fixed in moment 2.31.0, and users should upgrade to 2.31.0 or later. As a workaround, validate that any user-supplied input is a string before passing it to moment.locale().

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-17495 since 07/26/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 2.31.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-78277). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

• moment

Version

• 2.30.0
• 2.30.1

Website

• Product: https://github.com/moment/moment/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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