CVE-2026-17495

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().

Database specific

{
    "cna_assigner": "openjs",
    "cwe_ids": [
        "CWE-27"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/17xxx/CVE-2026-17495.json"
}

References

Affected packages

Git / github.com/moment/moment

Affected ranges

Type

GIT

Repo

https://github.com/moment/moment

Events

Introduced

75e2ac573e8cd62086a6bc6dc1b8d271e2804391

Fixed

15b45d48a176312e8f34143c5a800090abf4787f

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "2.29.2"
        },
        {
            "fixed": "2.31.0"
        },
        {
            "fixed": "2.30.1"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

2.*

2.29.2

2.29.4

2.30.0

2.30.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-17495.json"