{"schemaVersion":3,"id":"CVE-2026-58403","aliases":["UBUNTU-CVE-2026-58403","DEBIAN-CVE-2026-58403","GHSA-c3wq-j5vh-68rc","GO-2026-5309"],"status":"published","duplicateOf":null,"title":null,"description":"Hugo is a static site generator. From v0.123.0 through v0.163.0, Hugo's virtual filesystem is designed so that files under a mount cannot reach outside the mount tree, but a regression caused RootMappingFs.statRoot to call Stat, which follows symlinks, instead of Lstat, so a direct os.ReadFile \"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. 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