{"id":"CVE-2026-50135","revision":null,"records":[{"revision":"0119ada898294f8a868029b2b3bc6c7e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-50135","aliases":[],"title":"Hugo: Symlink confinement bypass in resources.Get","description":"Hugo is a static site generator. From 0.123.0 to 0.161.1, a regression made \u00A0RootMappingFs.statRoot\u00A0 use \u00A0Stat\u00A0 (follows symlinks) instead of \u00A0Lstat\u00A0, so a direct \u00A0resources.Get\u00A0 of a symlink pointing outside its mount returned the target's contents — letting a symlink planted in a local mount (e.g. a vendored \u00A0themes/\u00A0 theme) read arbitrary files accessible to the Hugo user. Go-module themes from GitHub (symlinks stripped) and directory walks were unaffected. Fixed in 0.162.0.","state":0,"publishedAt":"2026-07-06T19:52:04.561+00:00","modifiedAt":"2026-07-07T16:57:29.874+00:00","affected":[{"ecosystem":"Vendor product","name":"hugo","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"gohugoio\",\n                    \"product\": \"hugo\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 0.123.0, < 0.162.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":6.9,"severity":"MEDIUM"}],"references":["https://github.com/gohugoio/hugo/security/advisories/GHSA-fw87-fv5r-9fpw","https://github.com/gohugoio/hugo/commit/f8b5fa09a64950c32b803821ede411ebfe772b7a","https://github.com/gohugoio/hugo/releases/tag/v0.162.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-50135","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-50135","identifiers":["CVE-2026-50135"]},"retained":false,"historicalAffected":[]},{"revision":"3a8d05261a2a48b089e0eefb9f2969c6","observedAt":"2026-11-07T11:32:46.056+00:00","statement":{"source":"euvd","id":"EUVD-2026-41922","aliases":["CVE-2026-50135","GHSA-fw87-fv5r-9fpw"],"title":"Hugo is a static site generator. From 0.123.0 to 0.161.1, a regression made \u00A0RootMappingFs.statRoot\u00A0 use \u00A0Stat\u00A0 (follows symlinks) instead of \u00A0Lstat\u00A0, so a direct \u00A0resources.Get\u00A0 of a symlink pointing outside its mount returned the target's…","description":"Hugo is a static site generator. From 0.123.0 to 0.161.1, a regression made \u00A0RootMappingFs.statRoot\u00A0 use \u00A0Stat\u00A0 (follows symlinks) instead of \u00A0Lstat\u00A0, so a direct \u00A0resources.Get\u00A0 of a symlink pointing outside its mount returned the target's contents — letting a symlink planted in a local mount (e.g. a vendored \u00A0themes/\u00A0 theme) read arbitrary files accessible to the Hugo user. Go-module themes from GitHub (symlinks stripped) and directory walks were unaffected. Fixed in 0.162.0.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":6.9,"severity":null}],"references":["https://github.com/gohugoio/hugo/security/advisories/GHSA-fw87-fv5r-9fpw","https://github.com/gohugoio/hugo/commit/f8b5fa09a64950c32b803821ede411ebfe772b7a","https://github.com/gohugoio/hugo/releases/tag/v0.162.0"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-41922","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jul 6, 2026, 7:52:04 PM","dateUpdated":"Jul 7, 2026, 4:57:29 PM"},"relatedAdvisories":[{"id":"RHSA-2026:24577","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","vulnerabilityIds":["CVE-2026-45287","CVE-2026-50134","CVE-2026-50135"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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Fixed in 0.162.0.","state":0,"publishedAt":"2026-07-06T21:16:56.347+00:00","modifiedAt":"2026-10-25T20:10:00.147+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/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","score":6.9,"severity":"MEDIUM"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","score":5.5,"severity":"MEDIUM"}],"references":["https://github.com/gohugoio/hugo/commit/f8b5fa09a64950c32b803821ede411ebfe772b7a","https://github.com/gohugoio/hugo/releases/tag/v0.162.0","https://github.com/gohugoio/hugo/security/advisories/GHSA-fw87-fv5r-9fpw"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-50135","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-59"],"productCriteria":["cpe:2.3:a:gohugo:hugo:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-07-06T21:16:56.347","lastModified":"2026-10-25T20:10:00.147"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. 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Themes mounted as Go modules from GitHub have symlinks stripped on download and are not affected. Multi-directory walks (e.g. content/asset walking) were not affected either; only direct lookups via `resources.Get` followed symlinks.\n\n**Description.** Hugo's virtual filesystem is designed so that files under a mount cannot reach outside the mount tree. A regression introduced in v0.123.0 caused `RootMappingFs.statRoot` to call `Stat` (which follows symlinks) instead of `Lstat`, so a direct `resources.Get \"somefile\"` where `somefile` was a symlink pointing outside the mount would return the target's contents. This effectively let a symlink planted inside a theme or local mount read arbitrary files reachable to the user running `hugo`.\n\n**Mitigation.** v0.162.0 calls `LstatIfPossible` and rejects symlinked entries with `os.ErrNotExist`, matching the behaviour of pre-v0.123.0 releases and of the directory-walking code paths.","state":0,"publishedAt":"2026-06-16T20:12:34+00:00","modifiedAt":"2026-07-07T20:41:13.6563147+00:00","affected":[{"ecosystem":"Go","name":"github.com/gohugoio/hugo","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.123.0"},{"kind":"fixed","version":"0.162.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/gohugoio/hugo/security/advisories/GHSA-fw87-fv5r-9fpw","https://github.com/gohugoio/hugo/commit/f8b5fa09a64950c32b803821ede411ebfe772b7a","https://github.com/gohugoio/hugo","https://github.com/gohugoio/hugo/releases/tag/v0.162.0"],"sourceUrl":"https://github.com/advisories/GHSA-fw87-fv5r-9fpw","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-fw87-fv5r-9fpw","identifiers":["GHSA-fw87-fv5r-9fpw","CVE-2026-50135","GO-2026-5380"]},"retained":false,"historicalAffected":[]},{"revision":"3fbb45edbf4246f49d7f95dbf243f52d","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-5380","aliases":["CVE-2026-50135","GHSA-fw87-fv5r-9fpw"],"title":"Hugo: Symlink confinement bypass in resources.Get in github.com/gohugoio/hugo","description":"Hugo: Symlink confinement bypass in resources.Get in github.com/gohugoio/hugo","state":0,"publishedAt":"2026-07-07T16:52:19+00:00","modifiedAt":"2026-07-07T20:30:13.6011742+00:00","affected":[{"ecosystem":"Go","name":"github.com/gohugoio/hugo","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.123.0"},{"kind":"fixed","version":"0.162.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/gohugoio/hugo/security/advisories/GHSA-fw87-fv5r-9fpw","https://github.com/gohugoio/hugo/commit/f8b5fa09a64950c32b803821ede411ebfe772b7a","https://github.com/gohugoio/hugo/releases/tag/v0.162.0"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-5380","license":"OSV · upstream source license applies","key":"osv:GO-2026-5380","identifiers":["GO-2026-5380","CVE-2026-50135","GHSA-fw87-fv5r-9fpw"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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