{"id":"CVE-2026-89259","title":"Hugo before v0.165.0 Insufficient Permission Restriction via TailwindCSS","summary":"Hugo is a static site generator. From v0.161.0, Hugo executes Node tools under Node's permission model, but TailwindCSS — included in the default security.exec.allow list — requires a highly permissive configuration (--allow-addons, --al…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-250"],"vendor":"gohugoio","product":"hugo","affected":["hugo < 0.165.0"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-09-11T17:11:14.920833Z"},"published":"2026-09-11","updated":"2026-09-11","sourceUpdated":"2026-09-11T20:29:43.170Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89259","references":[{"url":"https://github.com/gohugoio/hugo/security/advisories/GHSA-vrm6-x8vp-mv2r","label":"GitHub Security Advisory (GHSA-vrm6-x8vp-mv2r)"},{"url":"https://www.vulncheck.com/advisories/hugo-before-0.165.0-insufficient-permission-restriction-via-tailwindcss","label":"VulnCheck Advisory: Hugo before v0.165.0 Insufficient Permission Restriction via TailwindCSS"}],"tags":["cve.org"],"epss":0.00411,"epssPercentile":0.35012,"ingestedAt":"2026-09-14T11:11:19.882Z","slug":"CVE-2026-89259","body":"## Overview\n\nHugo is a static site generator. From v0.161.0, Hugo executes Node tools under Node's permission model, but TailwindCSS — included in the default security.exec.allow list — requires a highly permissive configuration (--allow-addons, --allow-child-process, --allow-worker). As a result, the restrictions intended by the fix for GHSA-x597-9fr4-5857 could still be bypassed, allowing a Node tool invoked during a build to read and write files outside the project's working directory. Affected versions are those after v0.43; the issue was fixed in v0.165.0 by removing tailwindcss from the default security.exec.allow list. Users who do not use TailwindCSS, or who only build trusted sites, are not affected. As a workaround, users can define a restrictive security.exec.allow list in hugo.toml.\n\n## Affected\n\n- `hugo < 0.165.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}