ubuntu-cve-2026-2950
Vulnerability from osv_ubuntu
Published
2026-03-31 20:16
Modified
2026-06-09 19:23
Summary
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
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"
          },
          {
            "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"
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.