MediumGHSA-4p3w-j4w9-5jqwCVE-2026-17495

moment vulnerable to Path Traversal via crafted non-string locale name

Published 29 Sept 2026 · Updated 30 Sept 2026

Affected package

Affected: >=2.29.2 <2.31.0
Fixed in: 2.31.0

Update to the fixed version for your release line, for example:npm install moment@2.31.0

Details

Impact

moment before 2.31.0 is vulnerable to path traversal in moment.locale(). When an application passes a non-string, attacker-influenced value to moment.locale(), a specially crafted object can bypass the locale name validation and cause moment to load a file from an attacker-controlled path. This is a further bypass of the validation added in 2.29.2 for CVE-2022-24785.

This affects server-side (npm) users only. Plain string input is not affected: the existing validation correctly rejects strings that contain path separators.

Patches

This issue is patched in moment 2.31.0.

Workarounds

Validate that any user-supplied input is a string before passing it to moment.locale().

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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.