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":  [
        {
            "range":  [
                {
                    "introduced":  "2.29.2"
                },
                {
                    "fixed":  "2.31.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        },
        {
            "range":  [
                {
                    "introduced":  "2.29.2"
                },
                {
                    "last_affected":  "2.30.1"
                }
            ],
            "source":  "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"