moment vulnerable to Path Traversal via crafted non-string locale name — GHSA-4P3W-J4W9-5JQW

Summary

### 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…

Timeline

Published by source

2026-09-29

Risk context

• Reported severity or threat level: medium.
• Reported CVSS score: 5.9 out of 10.
• Reported EPSS value: 0.00357.
• Review exposure for the affected product or family: npm: moment.

Product

npm: moment

What to do

General, cautious steps (verify details in the official source):

• Review exposure and plan remediation based on risk and environment.
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

GHSA-4P3W-J4W9-5JQW

Source

GitHub

Vendor

GitHub

Published by source

2026-09-29

Last source activity

2026-09-29

Additional identifiers

CVE-2026-17495

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.