Vulnerability-Lookup

GHSA-4P3W-J4W9-5JQW

Vulnerability from github – Published: 2026-09-29 23:46 – Updated: 2026-09-29 23:46

Summary

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

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().

Severity

5.9 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

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JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "moment"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.29.2"
            },
            {
              "fixed": "2.31.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-17495"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-27"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-29T23:46:02Z",
    "nvd_published_at": "2026-09-15T06:16:57Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nmoment 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](https://github.com/moment/moment/security/advisories/GHSA-8hfj-j24r-96c4).\n\nThis affects server-side (npm) users only. Plain string input is not affected: the existing validation correctly rejects strings that contain path separators.\n\n### Patches\n\nThis issue is patched in moment 2.31.0.\n\n### Workarounds\n\nValidate that any user-supplied input is a string before passing it to `moment.locale()`.",
  "id": "GHSA-4p3w-j4w9-5jqw",
  "modified": "2026-09-29T23:46:02Z",
  "published": "2026-09-29T23:46:02Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/moment/moment/security/advisories/GHSA-4p3w-j4w9-5jqw"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-17495"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moment/moment/pull/6386"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moment/moment/commit/5f7d983c9881e65e07574de9dda3190d99520c07"
    },
    {
      "type": "WEB",
      "url": "https://cna.openjsf.org/security-advisories.html"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/moment/moment"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moment/moment/releases/tag/2.31.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "moment vulnerable to Path Traversal via crafted non-string locale name"
}

CVE-2026-17495 (GCVE-0-2026-17495)

Vulnerability from cvelistv5 – Published: 2026-09-15 05:40 – Updated: 2026-09-15 17:49

Title

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

Summary

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().

Severity

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-15 17:49 UTC

CWE

CWE-27 - Path Traversal: 'dir/../../filename'

Assigner

openjs redhat root Scorecard

References

2 references

URL	Tags
https://github.com/moment/moment/security/advisor…
https://cna.openjsf.org/security-advisories.html

Impacted products

1 product

Vendor	Product	Version
moment	moment	Affected: 2.29.2 , < 2.31.0 (semver) Unaffected: 2.31.0 (semver)

Credits

zolbooo UlisesGascon gilmoreorless mattjohnsonpint

Show details on NVD website

JSON

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                "timestamp": "2026-09-15T17:49:29.629363Z",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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