{"id":"GHSA-c54g-xjwj-8g82","summary":"Hugo: XSS via text/html content files","details":"**Commit:** [e41a06447d](https://github.com/gohugoio/hugo/commit/e41a06447d) — _Disallow HTML content by default_\n**Affected versions:** all Hugo versions prior to v0.162.0.\n**Fixed in:** v0.162.0.\n**Severity:** Low to Medium, depending on threat model. Not an issue if you fully trust every file under `/content` and every content adapter you load.\n\n**Description.** Hugo accepts content files in several markup formats. Files mapped to the `text/html` media type (typically `.html` files under `/content`, or pages produced by a content adapter that sets `content.mediaType = \"text/html\"`) had their body emitted verbatim into the rendered page. A site that ingests HTML content from an untrusted source — for example, a CMS-backed editor, a content adapter pulling from an external API, or an automated import pipeline — could therefore be served stored cross-site scripting.\n\n**Mitigation.** v0.162.0 introduces a `security.allowContent` whitelist with `text/html` denied by default. Sites that intentionally author HTML content can opt back in:\n\n```toml\n[security]\nallowContent = ['.*']\n```\n\nThis only affects pages whose source file (or content adapter output) declares an HTML media type; Markdown, AsciiDoc, Org, Pandoc and reStructuredText content is unaffected.","aliases":["CVE-2026-50133","GO-2026-5313"],"modified":"2026-07-07T20:41:27.372062166Z","published":"2026-06-16T19:22:14Z","database_specific":{"github_reviewed_at":"2026-06-16T19:22:14Z","nvd_published_at":null,"cwe_ids":["CWE-79"],"severity":"MODERATE","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/gohugoio/hugo/security/advisories/GHSA-c54g-xjwj-8g82"},{"type":"WEB","url":"https://github.com/gohugoio/hugo/commit/e41a06447daa3071a01f333fdcec0a5153c3c8d1"},{"type":"PACKAGE","url":"https://github.com/gohugoio/hugo"},{"type":"WEB","url":"https://github.com/gohugoio/hugo/releases/tag/v0.162.0"}],"affected":[{"package":{"name":"github.com/gohugoio/hugo","ecosystem":"Go","purl":"pkg:golang/github.com/gohugoio/hugo"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.162.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-c54g-xjwj-8g82/GHSA-c54g-xjwj-8g82.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"}]}