CVE-2026-17495: Moment

Medium severity, CVSS 5.9. EPSS: 0.4% chance of exploitation in the next 30 days.

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().

Affected products

• Moment Moment: from 2.29.2, before 2.31.0 (fixed in 2.31.0)

Published 2026-09-15. Last modified 2026-09-16.