node-lodash — security advisory

{
  "id": "10c3ad22de5f520fe3c4c73722f72c704d7c0141c91c81b32ca92d73f91c08f8",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-2950",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-2950",
    "summary": "The _.unset and _.omit functions in Lodash are vulnerable to prototype pollution. 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. The issue is patched from 4.18.0 to 4.18.1 depending on the package: lodash, lodash-es, and lodash-amd in 4.18.1, and the standalone lodash.unset and lodash.omit packages in 4.18.0.",
    "evidence": "osv:DEBIAN-CVE-2026-2950",
    "products": [
      {
        "name": {
          "value": "node-lodash",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.17.21+dfsg+~cs8.31.198.20210220-9+deb12u1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "4.17.21+dfsg+~cs8.31.198.20210220-9",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "node-lodash",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.17.21+dfsg+~cs8.31.198.20210220-9+deb13u1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "4.17.21+dfsg+~cs8.31.198.20210220-9",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "node-lodash",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.18.1+dfsg-1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "4.17.21+dfsg+~cs8.31.198.20210220-10",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "4.17.21+dfsg+~cs8.31.198.20210220-9",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "4.17.23+dfsg-1",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "DEBIAN-CVE-2026-2950",
      "aliases": [
        "DEBIAN-CVE-2026-2950"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "4.17.21+dfsg+~cs8.31.198.20210220-9+deb12u1"
                }
              ]
            }
          ],
          "package": {
            "name": "node-lodash",
            "purl": "pkg:deb/debian/node-lodash?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "versions": [
            "4.17.21+dfsg+~cs8.31.198.20210220-9"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-2950.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "4.17.21+dfsg+~cs8.31.198.20210220-9+deb13u1"
                }
              ]
            }
          ],
          "package": {
            "name": "node-lodash",
            "purl": "pkg:deb/debian/node-lodash?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "4.17.21+dfsg+~cs8.31.198.20210220-9"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-2950.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "4.18.1+dfsg-1"
                }
              ]
            }
          ],
          "package": {
            "name": "node-lodash",
            "purl": "pkg:deb/debian/node-lodash?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "4.17.21+dfsg+~cs8.31.198.20210220-10",
            "4.17.21+dfsg+~cs8.31.198.20210220-9",
            "4.17.23+dfsg-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-2950.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-16T09:47:29.166733100Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-2950"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-2950"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-2950",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 338601,
  "published_at": "2026-03-31T20:16:26.207+00:00"
}