GHSA-f23m-r3pf-42rh

Lodash versions 4.17.23 and earlier are vulnerable to prototype pollution in the _.unset and _.omit functions. The fix for CVE-2025-13465 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

{
    "nvd_published_at": "2026-03-31T20:16:26Z",
    "severity": "MODERATE",
    "github_reviewed": true,
    "cwe_ids": [
        "CWE-1321"
    ],
    "github_reviewed_at": "2026-04-01T23:50:27Z"
}

References

Affected packages

npm / lodash

Package

Name: lodash; View open source insights on deps.dev
Purl: pkg:npm/lodash

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

4.18.0

Database specific

last_known_affected_version_range

"<= 4.17.23"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-f23m-r3pf-42rh/GHSA-f23m-r3pf-42rh.json"

npm / lodash-es

Package

Name: lodash-es; View open source insights on deps.dev
Purl: pkg:npm/lodash-es

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

4.18.0

Database specific

last_known_affected_version_range

"<= 4.17.23"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-f23m-r3pf-42rh/GHSA-f23m-r3pf-42rh.json"

npm / lodash-amd

Package

Name: lodash-amd; View open source insights on deps.dev
Purl: pkg:npm/lodash-amd

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

4.18.0

Database specific

last_known_affected_version_range

"<= 4.17.23"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-f23m-r3pf-42rh/GHSA-f23m-r3pf-42rh.json"

npm / lodash.unset

Package

Name: lodash.unset; View open source insights on deps.dev
Purl: pkg:npm/lodash.unset

Affected ranges

Type: SEMVER
Events: Introduced

4.0.0

Fixed

4.18.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-f23m-r3pf-42rh/GHSA-f23m-r3pf-42rh.json"