Vulnerability-Lookup

CVE-2026-2950 (GCVE-0-2026-2950)

Vulnerability from cvelistv5 – Published: 2026-03-31 19:18 – Updated: 2026-04-01 13:43

Title

lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit`

Summary

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.

Severity ?

6.5 (Medium)


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

CWE

CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Assigner

openjs

References

URL

Tags

https://github.com/lodash/lodash/security/advisor…

Impacted products

Vendor

Product

Version

lodash

Affected: 4.17.23 , < 4.18.0 (semver)
Unaffected: 4.18.0 (semver)

lodash	lodash-es	Affected: 4.17.23 , < 4.18.0 (semver) Unaffected: 4.18.0 (semver)
lodash	lodash-amd	Affected: 4.17.23 , < 4.18.0 (semver) Unaffected: 4.18.0 (semver)
lodash	lodash.unset	Affected: 4.0.0 , < 4.18.0 (semver) Unaffected: 4.18.0 (semver)

Credits

Haruna38 shpik-kr maru1009 ott3r07 zolbooo backuardo falsyvalues jonchurch jdalton UlisesGascon

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-2950

Vulnerability from fkie_nvd - Published: 2026-03-31 20:16 - Updated: 2026-04-01 14:23

Severity ?

6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Summary

References

	URL	Tags
	ce714d77-add3-4f53-aff5-83d477b104bb	https://github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-F23M-R3PF-42RH

Vulnerability from github – Published: 2026-04-01 23:50 – Updated: 2026-04-01 23:50

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 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.

Severity ?

6.5 (Medium)


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

Show details on source website

JSON

To clipboard

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    "github_reviewed": true,
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    "nvd_published_at": "2026-03-31T20:16:26Z",
    "severity": "MODERATE"
  },
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  "modified": "2026-04-01T23:50:27Z",
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    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2950"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/lodash/lodash"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit`"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-2950 (GCVE-0-2026-2950)

FKIE_CVE-2026-2950

GHSA-F23M-R3PF-42RH

Impact

Patches

Workarounds

Tags

Sightings

Nomenclature