{"id":"UBUNTU-CVE-2026-2950","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.","modified":"2026-05-20T16:12:04.940834950Z","published":"2026-03-31T20:16:00Z","upstream":["CVE-2026-2950"],"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"}],"affected":[{"package":{"name":"node-lodash","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/node-lodash?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.1+dfsg-3"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-lodash","binary_version":"2.4.1+dfsg-3"},{"binary_name":"node-lodash","binary_version":"2.4.1+dfsg-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2950.json"}},{"package":{"name":"node-lodash","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/node-lodash?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.17.4+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-lodash","binary_version":"4.17.4+dfsg-1"},{"binary_name":"node-lodash","binary_version":"4.17.4+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2950.json"}},{"package":{"name":"node-lodash","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/node-lodash?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.17.11+dfsg-4","4.17.15+dfsg-2"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-lodash","binary_version":"4.17.15+dfsg-2"},{"binary_name":"node-lodash","binary_version":"4.17.15+dfsg-2"},{"binary_name":"node-lodash-packages","binary_version":"4.17.15+dfsg-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2950.json"}},{"package":{"name":"node-lodash","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/node-lodash?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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":{"binaries":[{"binary_name":"libjs-lodash","binary_version":"4.17.21+dfsg+~cs8.31.198.20210220-5"},{"binary_name":"node-lodash","binary_version":"4.17.21+dfsg+~cs8.31.198.20210220-5"},{"binary_name":"node-lodash-packages","binary_version":"4.17.21+dfsg+~cs8.31.198.20210220-5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2950.json"}},{"package":{"name":"node-lodash","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/node-lodash?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.17.21+dfsg+~cs8.31.198.20210220-9"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-lodash","binary_version":"4.17.21+dfsg+~cs8.31.198.20210220-9"},{"binary_name":"node-lodash","binary_version":"4.17.21+dfsg+~cs8.31.198.20210220-9"},{"binary_name":"node-lodash-packages","binary_version":"4.17.21+dfsg+~cs8.31.198.20210220-9"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2950.json"}},{"package":{"name":"node-lodash","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/node-lodash?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.17.21+dfsg+~cs8.31.198.20210220-9"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-lodash","binary_version":"4.17.21+dfsg+~cs8.31.198.20210220-9"},{"binary_name":"node-lodash","binary_version":"4.17.21+dfsg+~cs8.31.198.20210220-9"},{"binary_name":"node-lodash-packages","binary_version":"4.17.21+dfsg+~cs8.31.198.20210220-9"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2950.json"}},{"package":{"name":"node-lodash","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/node-lodash?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.17.21+dfsg+~cs8.31.198.20210220-9","4.17.23+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-lodash","binary_version":"4.17.23+dfsg-1"},{"binary_name":"node-lodash","binary_version":"4.17.23+dfsg-1"},{"binary_name":"node-lodash-packages","binary_version":"4.17.23+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2950.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","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":"Ubuntu","score"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