{"id":"UBUNTU-CVE-2026-100694","details":"Hugo is a static site generator. In versions from v0.56.0 through v0.165.x, content files mapped to the text/org media type are rendered without escaping raw HTML: Org export blocks and @@html:...@@ snippets pass HTML through unescaped, resulting in cross-site scripting (XSS) in the generated site. An attacker who can supply or influence a content file under /content or the output of a content adapter can inject scripts that execute in the browsers of visitors to the affected pages. Only pages whose source file or content-adapter output declares the text/org media type are affected, and sites that fully trust all content sources are not impacted. Version v0.166.0 fixes the issue by introducing a security.allowContent allowlist that denies text/org by default; sites that intentionally author Org Mode content can opt back in with [security] allowContent = ['.*'].","modified":"2026-09-30T21:41:52Z","published":"2026-09-26T14:16:00Z","upstream":["CVE-2026-100694"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-100694"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-100694"},{"type":"REPORT","url":"https://github.com/gohugoio/hugo/security/advisories/GHSA-pq74-mj4h-cjq2"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/hugo-before-0.166.0-cross-site-scripting-via-text-org"}],"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_version":"0.15+git20160206.203.ed23711-1","binary_name":"golang-github-spf13-hugo-dev"},{"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-2026-100694.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-2026-100694.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-2026-100694.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-2026-100694.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-2026-100694.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_version":"0.154.5-1","binary_name":"hugo"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100694.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"type":"Ubuntu","score":"medium"}]}