{"id":"JLSEC-2026-794","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.","modified":"2026-07-25T03:50:08.578266524Z","published":"2026-07-25T03:41:43.685Z","upstream":["CVE-2026-50133","EUVD-2026-41909","GHSA-c54g-xjwj-8g82"],"database_specific":{"license":"CC-BY-4.0","sources":[{"database_specific":{"status":"Analyzed"},"id":"CVE-2026-50133","imported":"2026-07-24T13:46:36.652Z","modified":"2026-07-08T03:08:33.383Z","published":"2026-07-06T20:16:37.043Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-50133","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50133"},{"imported":"2026-07-24T13:46:39.963Z","modified":"2026-06-16T19:22:16Z","published":"2026-06-16T19:22:14Z","url":"https://api.github.com/advisories/GHSA-c54g-xjwj-8g82","html_url":"https://github.com/advisories/GHSA-c54g-xjwj-8g82","id":"GHSA-c54g-xjwj-8g82"},{"html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-41909","id":"EUVD-2026-41909","imported":"2026-07-24T13:46:37.731Z","modified":"2026-07-07T14:44:31Z","published":"2026-07-06T19:31:18Z","url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-41909"}]},"references":[{"type":"WEB","url":"https://github.com/advisories/GHSA-c54g-xjwj-8g82"},{"type":"WEB","url":"https://github.com/gohugoio/hugo/commit/e41a06447daa3071a01f333fdcec0a5153c3c8d1"},{"type":"WEB","url":"https://github.com/gohugoio/hugo/releases/tag/v0.162.0"},{"type":"WEB","url":"https://github.com/gohugoio/hugo/security/advisories/GHSA-c54g-xjwj-8g82"}],"affected":[{"package":{"name":"Hugo_jll","ecosystem":"Julia","purl":"pkg:julia/Hugo_jll?uuid=c8420254-0ddf-5525-a2d3-3ad9242def7d"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.163.3+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-794.json"}}],"schema_version":"1.7.5","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}],"credits":[{"name":"jmooring","contact":["https://github.com/jmooring"],"type":"ANALYST"}]}