{"id":"UBUNTU-CVE-2026-27837","details":"Dottie provides nested object access and manipulation in JavaScript. Versions 2.0.4 through 2.0.6 contain an incomplete fix for CVE-2023-26132. The prototype pollution guard introduced in commit `7d3aee1` only validates the first segment of a dot-separated path, allowing an attacker to bypass the protection by placing `__proto__` at any position other than the first. Both `dottie.set()` and `dottie.transform()` are affected. Version 2.0.7 contains an updated fix to address the residual vulnerability.","modified":"2026-05-20T16:24:52.591006357Z","published":"2026-02-26T01:16:00Z","upstream":["CVE-2026-27837"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-27837"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-27837"},{"type":"REPORT","url":"https://github.com/advisories/GHSA-4gxf-g5gf-22h4"},{"type":"REPORT","url":"https://github.com/mickhansen/dottie.js/commit/7e8fa1345a4b46325f0eab8d7aeb1c4deaefdb14"},{"type":"REPORT","url":"https://github.com/mickhansen/dottie.js/security/advisories/GHSA-r5mx-6wc6-7h9w"}],"affected":[{"package":{"name":"node-dottie","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/node-dottie?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.2-1","2.0.2-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.2-1ubuntu0.1~esm1","binary_name":"node-dottie"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27837.json"}},{"package":{"name":"node-dottie","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/node-dottie?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.2-1","2.0.2-3","2.0.2-4","2.0.2-4ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.2-4ubuntu0.1~esm1","binary_name":"node-dottie"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27837.json"}},{"package":{"name":"node-dottie","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/node-dottie?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.6+~2.0.5-2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.6+~2.0.5-2","binary_name":"node-dottie"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27837.json"}},{"package":{"name":"node-dottie","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/node-dottie?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.6+~2.0.5-2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.6+~2.0.5-2","binary_name":"node-dottie"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27837.json"}},{"package":{"name":"node-dottie","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/node-dottie?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.6+~2.0.5-2","2.0.7+~2.0.7-1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-dottie","binary_version":"2.0.7+~2.0.7-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27837.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}