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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-01 13:43 UTC

CWE

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

Assigner

openjs redhat root

References

1 reference

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

Impacted products

4 products

Vendor	Product	Version	CPE status
lodash	lodash	Affected: 4.17.23 , < 4.18.0 (semver) Unaffected: 4.18.0 (semver)	guessed
lodash	lodash-es	Affected: 4.17.23 , < 4.18.0 (semver) Unaffected: 4.18.0 (semver)	guessed
lodash	lodash-amd	Affected: 4.17.23 , < 4.18.0 (semver) Unaffected: 4.18.0 (semver)	guessed
lodash	lodash.unset	Affected: 4.0.0 , < 4.18.0 (semver) Unaffected: 4.18.0 (semver)	guessed

Credits

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

Show details on NVD website

JSON

To clipboard

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                }
              ],
              "value": "Impact:\n\nLodash 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.\n\nThe issue permits deletion of prototype properties but does not allow overwriting their original behavior.\n\nPatches:\n\nThis issue is patched in 4.18.0.\n\nWorkarounds:\n\nNone. Upgrade to the patched version."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 6.5,
                "baseSeverity": "MEDIUM",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
                "version": "3.1"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-1321",
                  "description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-03-31T19:18:35.796Z",
            "orgId": "ce714d77-add3-4f53-aff5-83d477b104bb",
            "shortName": "openjs"
          },
          "references": [
            {
              "url": "https://github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg"
            }
          ],
          "title": "lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit`",
          "x_generator": {
            "engine": "cve-kit 1.0.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "ce714d77-add3-4f53-aff5-83d477b104bb",
        "assignerShortName": "openjs",
        "cveId": "CVE-2026-2950",
        "datePublished": "2026-03-31T19:18:35.796Z",
        "dateReserved": "2026-02-21T20:04:35.087Z",
        "dateUpdated": "2026-04-01T13:43:21.491Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

RHSA-2026:7378

Vulnerability from csaf_redhat - Published: 2026-04-10 13:03 - Updated: 2026-09-18 22:40

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Important

Scope

21 vulnerabilities in this advisory, including CVE-2026-2950.

CVE-2026-2950

A flaw was found in Lodash. An attacker can exploit a prototype pollution vulnerability in the `_.unset` and `_.omit` functions by bypassing a security check. This bypass is achieved by providing array-wrapped path segments, which allows for the deletion of properties from built-in JavaScript prototypes such as `Object.prototype`. This could lead to unexpected application behavior or denial of service.

6.5 (Medium)


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

Fixed: 4 products

https://access.redhat.com/errata/RHSA-2026:7378

Open the full advisory

RHSA-2026:7655

Vulnerability from csaf_redhat - Published: 2026-04-11 00:49 - Updated: 2026-09-18 22:40

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Important

Scope

5 vulnerabilities in this advisory, including CVE-2026-2950.

CVE-2026-2950

6.5 (Medium)


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

Fixed: 3 products

https://access.redhat.com/errata/RHSA-2026:7655

Open the full advisory

RHSA-2026:9455

Vulnerability from csaf_redhat - Published: 2026-04-21 17:31 - Updated: 2026-09-18 22:40

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Important

Scope

14 vulnerabilities in this advisory, including CVE-2026-2950.

CVE-2026-2950

6.5 (Medium)


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

Fixed: 4 products

https://access.redhat.com/errata/RHSA-2026:9455

Open the full advisory

UBUNTU-CVE-2026-2950 (CVE-2026-2950)

Vulnerability from osv_ubuntu – Published: 2026-03-31 20:16 – Updated: 2026-06-09 19:23 – Source website

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.

Severity

6.5 (Medium)


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

5.3 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-2950	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-2950	REPORT
	https://github.com/lodash/lodash/security/advisor…	REPORT
	https://ubuntu.com/security/notices/USN-8411-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libjs-lodash",
            "binary_version": "2.4.1+dfsg-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "node-lodash",
            "binary_version": "2.4.1+dfsg-3ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "node-lodash",
        "purl": "pkg:deb/ubuntu/node-lodash@2.4.1+dfsg-3ubuntu0.1~esm1?arch=source\u0026distro=esm-apps-legacy/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.1+dfsg-3ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.1+dfsg-3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libjs-lodash",
            "binary_version": "4.17.4+dfsg-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "node-lodash",
            "binary_version": "4.17.4+dfsg-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "node-lodash",
        "purl": "pkg:deb/ubuntu/node-lodash@4.17.4+dfsg-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.17.4+dfsg-1ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.17.4+dfsg-1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libjs-lodash",
            "binary_version": "4.17.15+dfsg-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "node-lodash",
            "binary_version": "4.17.15+dfsg-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "node-lodash-packages",
            "binary_version": "4.17.15+dfsg-2ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "node-lodash",
        "purl": "pkg:deb/ubuntu/node-lodash@4.17.15+dfsg-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.17.15+dfsg-2ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.17.11+dfsg-4",
        "4.17.15+dfsg-2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libjs-lodash",
            "binary_version": "4.17.21+dfsg+~cs8.31.198.20210220-5ubuntu0.1~esm1"
          },
          {
            "binary_name": "node-lodash",
            "binary_version": "4.17.21+dfsg+~cs8.31.198.20210220-5ubuntu0.1~esm1"
          },
          {
            "binary_name": "node-lodash-packages",
            "binary_version": "4.17.21+dfsg+~cs8.31.198.20210220-5ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "node-lodash",
        "purl": "pkg:deb/ubuntu/node-lodash@4.17.21+dfsg+~cs8.31.198.20210220-5ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.17.21+dfsg+~cs8.31.198.20210220-5ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.17.21+dfsg+~cs8.31.173-1",
        "4.17.21+dfsg+~cs8.31.196.20210220-2",
        "4.17.21+dfsg+~cs8.31.198.20210220-4",
        "4.17.21+dfsg+~cs8.31.198.20210220-5"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libjs-lodash",
            "binary_version": "4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.24.04.1~esm1"
          },
          {
            "binary_name": "node-lodash",
            "binary_version": "4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.24.04.1~esm1"
          },
          {
            "binary_name": "node-lodash-packages",
            "binary_version": "4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.24.04.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "node-lodash",
        "purl": "pkg:deb/ubuntu/node-lodash@4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.24.04.1~esm1?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.24.04.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.17.21+dfsg+~cs8.31.198.20210220-9"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libjs-lodash",
            "binary_version": "4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.25.10.1"
          },
          {
            "binary_name": "node-lodash",
            "binary_version": "4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.25.10.1"
          },
          {
            "binary_name": "node-lodash-packages",
            "binary_version": "4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.25.10.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "node-lodash",
        "purl": "pkg:deb/ubuntu/node-lodash@4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.25.10.1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.25.10.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.17.21+dfsg+~cs8.31.198.20210220-9"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libjs-lodash",
            "binary_version": "4.17.23+dfsg-1ubuntu0.1~esm1"
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          {
            "binary_name": "node-lodash",
            "binary_version": "4.17.23+dfsg-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "node-lodash-packages",
            "binary_version": "4.17.23+dfsg-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:26.04:LTS",
        "name": "node-lodash",
        "purl": "pkg:deb/ubuntu/node-lodash@4.17.23+dfsg-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.17.23+dfsg-1ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.17.21+dfsg+~cs8.31.198.20210220-9",
        "4.17.23+dfsg-1"
      ]
    }
  ],
  "aliases": [],
  "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.",
  "id": "UBUNTU-CVE-2026-2950",
  "modified": "2026-06-09T19:23:51Z",
  "published": "2026-03-31T20:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-2950"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-2950"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8411-1"
    }
  ],
  "related": [
    "USN-8411-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-2950"
  ]
}

WID-SEC-W-2026-1328

Vulnerability from csaf_certbund - Published: 2026-05-03 22:00 - Updated: 2026-06-08 22:00

Summary

Red Hat Hardened Images RPMs: Mehrere Schwachstellen

Severity

Mittel

Scope

4 vulnerabilities in this advisory, including CVE-2026-2950.

CVE-2026-2950

Known affected: 10 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

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

RHSA-2026:7378

RHSA-2026:7655

RHSA-2026:9455

UBUNTU-CVE-2026-2950 (CVE-2026-2950)

WID-SEC-W-2026-1328

Tags

Sightings

Nomenclature

Related by attack behaviour