{"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":"2026-06-09T21:16:45.390092411Z","published":"2026-03-31T20:16:00Z","related":["USN-8411-1"],"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"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8411-1"}],"affected":[{"package":{"name":"node-lodash","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/node-lodash?arch=source&distro=esm-apps-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.1+dfsg-3ubuntu0.1~esm1"}]}],"versions":["2.4.1+dfsg-3"],"ecosystem_specific":{"binaries":[{"binary_version":"2.4.1+dfsg-3ubuntu0.1~esm1","binary_name":"libjs-lodash"},{"binary_version":"2.4.1+dfsg-3ubuntu0.1~esm1","binary_name":"node-lodash"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"},"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:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/node-lodash?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.17.4+dfsg-1ubuntu0.1~esm1"}]}],"versions":["4.17.4+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-lodash","binary_version":"4.17.4+dfsg-1ubuntu0.1~esm1"},{"binary_version":"4.17.4+dfsg-1ubuntu0.1~esm1","binary_name":"node-lodash"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"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:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/node-lodash?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.17.15+dfsg-2ubuntu0.1~esm1"}]}],"versions":["4.17.11+dfsg-4","4.17.15+dfsg-2"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-lodash","binary_version":"4.17.15+dfsg-2ubuntu0.1~esm1"},{"binary_version":"4.17.15+dfsg-2ubuntu0.1~esm1","binary_name":"node-lodash"},{"binary_name":"node-lodash-packages","binary_version":"4.17.15+dfsg-2ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"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:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/node-lodash?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.17.21+dfsg+~cs8.31.198.20210220-5ubuntu0.1~esm1"}]}],"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+~cs8.31.198.20210220-5ubuntu0.1~esm1"},{"binary_version":"4.17.21+dfsg+~cs8.31.198.20210220-5ubuntu0.1~esm1","binary_name":"node-lodash"},{"binary_name":"node-lodash-packages","binary_version":"4.17.21+dfsg+~cs8.31.198.20210220-5ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"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:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/node-lodash?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.24.04.1~esm1"}]}],"versions":["4.17.21+dfsg+~cs8.31.198.20210220-9"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-lodash","binary_version":"4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.24.04.1~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"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"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"},{"fixed":"4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.25.10.1"}]}],"versions":["4.17.21+dfsg+~cs8.31.198.20210220-9"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-lodash","binary_version":"4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.25.10.1"},{"binary_version":"4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.25.10.1","binary_name":"node-lodash"},{"binary_name":"node-lodash-packages","binary_version":"4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.25.10.1"}],"availability":"No subscription required"},"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:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/node-lodash?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.17.23+dfsg-1ubuntu0.1~esm1"}]}],"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-1ubuntu0.1~esm1"},{"binary_version":"4.17.23+dfsg-1ubuntu0.1~esm1","binary_name":"node-lodash"},{"binary_name":"node-lodash-packages","binary_version":"4.17.23+dfsg-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"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":"medium"}]}