CVE-2026-2950

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Source
https://cve.org/CVERecord?id=CVE-2026-2950
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-2950.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-2950
Aliases
Downstream
Related
Published
2026-03-31T19:18:35.796Z
Modified
2026-06-15T12:23:58.265459082Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L CVSS Calculator
Summary
lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit`
Details

Impact:

Lodash versions 4.17.23 and earlier are vulnerable to prototype pollution in the _.unset and _.omit functions. The fix for (CVE-2025-13465: https://github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg) only guards against string key members, so an attacker can bypass the check by passing array-wrapped path segments. This allows deletion of properties from built-in prototypes such as Object.prototype, Number.prototype, and String.prototype.

The issue permits deletion of prototype properties but does not allow overwriting their original behavior.

Patches:

This issue is patched in 4.18.0.

Workarounds:

None. Upgrade to the patched version.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2950.json",
    "cna_assigner": "openjs",
    "cwe_ids": [
        "CWE-1321"
    ]
}
References

Affected packages

Git / github.com/lodash/lodash

Affected ranges

Type
GIT
Repo
https://github.com/lodash/lodash
Events
Introduced
d35a9c40beb594d09814ba7f7673b81d4d67a816
Fixed
835a537f36ee2fd5fb7f524e213ff9ba2d8698f8
Database specific 
{
    "extracted_events": [
        {
            "introduced": "4.0.0"
        },
        {
            "fixed": "4.17.23"
        }
    ],
    "cpe": [
        "cpe:2.3:a:lodash:lodash:*:*:*:*:*:node.js:*:*",
        "cpe:2.3:a:lodash:lodash-amd:*:*:*:*:*:node.js:*:*",
        "cpe:2.3:a:lodash:lodash-es:*:*:*:*:*:node.js:*:*"
    ],
    "source": "CPE_RANGE"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-2950.json"