{"id":"UBUNTU-CVE-2026-109595","details":"Hugo from v0.84.0 before v0.167.0 contains a path traversal vulnerability that allows malicious themes or modules to read files outside the project root via ESBuild's fallback resolver in js.Build, js.Batch, and css.Build. Attackers can ship relative imports or symlinks pointing outside the project to bundle any file readable by the build user into published JavaScript or CSS output.","modified":"2026-10-17T12:53:14.639295066Z","published":"2026-10-12T23:17:00Z","upstream":["CVE-2026-109595"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-109595"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-109595"},{"type":"REPORT","url":"https://github.com/gohugoio/hugo/security/advisories/GHSA-r4xx-89rf-5424"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/hugo-0.84.0-before-0.167.0-path-traversal-via-js-build-esbuild-resolver"}],"affected":[{"package":{"name":"hugo","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/hugo?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.15+git20160109.147.dd1d655-1","0.15+git20160109.147.dd1d655-2","0.15+git20160128.179.5def6d9-1","0.15+git20160206.203.ed23711-1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-spf13-hugo-dev","binary_version":"0.15+git20160206.203.ed23711-1"},{"binary_version":"0.15+git20160206.203.ed23711-1","binary_name":"hugo"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109595.json"}},{"package":{"name":"hugo","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/hugo?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.25.1-2","0.26-1","0.35-1","0.37.1-1","0.38-1","0.39-1","0.40-1","0.40.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-gohugoio-hugo-dev","binary_version":"0.40.1-1"},{"binary_name":"hugo","binary_version":"0.40.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109595.json"}},{"package":{"name":"hugo","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/hugo?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.57.2-1","0.58.3-1","0.59.1-1.1","0.68.3-1"],"ecosystem_specific":{"binaries":[{"binary_name":"hugo","binary_version":"0.68.3-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109595.json"}},{"package":{"name":"hugo","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/hugo?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.80.0-6","0.89.4-2","0.90.0-1","0.90.1-1","0.91.0-1","0.91.2-1","0.92.0-1","0.92.1-1build1","0.92.2-1","0.92.2-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"hugo","binary_version":"0.92.2-1ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109595.json"}},{"package":{"name":"hugo","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/hugo?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.113.0-3","0.119.0-2","0.120.3-1","0.120.4-1","0.121.2-1","0.122.0-1","0.123.7-1build1","0.123.7-1ubuntu0.1","0.123.7-1ubuntu0.2","0.123.7-1ubuntu0.2+esm1","0.123.7-1ubuntu0.3","0.123.7-1ubuntu0.3+esm1","0.123.7-1ubuntu0.3+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"hugo","binary_version":"0.123.7-1ubuntu0.3+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109595.json"}},{"package":{"name":"hugo","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/hugo?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.154.5-1","0.162.1-5","0.162.1-7"],"ecosystem_specific":{"binaries":[{"binary_version":"0.162.1-7","binary_name":"hugo"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109595.json"}},{"package":{"name":"hugo","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/hugo?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.131.0-1","0.152.2-1","0.153.1-3","0.153.2-1","0.154.2-2","0.154.3-1","0.154.5-1"],"ecosystem_specific":{"binaries":[{"binary_name":"hugo","binary_version":"0.154.5-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109595.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}