{"schemaVersion":3,"id":"CVE-2026-89259","aliases":["UBUNTU-CVE-2026-89259","DEBIAN-CVE-2026-89259"],"status":"published","duplicateOf":null,"title":null,"description":"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, --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.","dates":{"published":"2026-09-11T11:15:35.062Z","modified":"2026-09-11T20:29:43.170Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":9.3,"severity":"critical","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"OSV · Ubuntu","score":9.3,"severity":"critical","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":10,"impact":9.8,"computed":true},{"version":"4.0","versionLabel":"v4.0","source":"OSV · Debian","score":9.3,"severity":"critical","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/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","exploitability":null,"impact":null,"computed":true},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":9.3,"severity":"critical","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/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","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00587,"percentile":0.47096,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.17600000000000002,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00411},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00411,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00411,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00411,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00411,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00411,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00411,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00411,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00411,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00411,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00411,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00587,"percentile":0.47096}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00411,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00411,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00411,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00411,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00587,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00587,"percentile":0.47096}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-250","name":"Execution with Unnecessary Privileges","description":"The product performs an operation at a privilege level that is higher than the minimum level required, which creates new weaknesses or amplifies the consequences of other weaknesses.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/250.html"}],"affected":[{"vendor":"debian","product":"hugo","name":"hugo","label":"hugo","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/hugo","purlType":"deb","versions":[{"text":"< 0.165.0-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.165.0-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"hugo","name":"hugo","label":"hugo","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/hugo","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"gohugoio","product":"hugo","name":"hugo","label":"hugo","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 0.165.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.165.0","eol":null,"hubHref":"/vendor/gohugoio/hugo"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/gohugoio/hugo/security/advisories/GHSA-vrm6-x8vp-mv2r","label":"github.com/gohugoio/hugo/security/advisories/GHSA-vrm6-x8vp-mv2r","hostname":"github.com","tags":["Vendor Advisory","REPORT"]},{"url":"https://www.vulncheck.com/advisories/hugo-before-0.165.0-insufficient-permission-restriction-via-tailwindcss","label":"www.vulncheck.com/advisories/hugo-before-0.165.0-insufficient-permission-restriction-via-tailwindcss","hostname":"www.vulncheck.com","tags":["Third Party Advisory","REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-89259","label":"ubuntu.com/security/CVE-2026-89259","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89259","label":"www.cve.org/CVERecord?id=CVE-2026-89259","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-89259","label":"security-tracker.debian.org/tracker/CVE-2026-89259","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-09-11T11:15:35.062Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-11T20:29:43.170Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T05:42:47.143Z","stale":false,"partial":false}}