Threats Tagged 'cve-2026-58403'

A security update for Red Hat Hardened Images includes fixes for vulnerabilities in the Hugo static site generator, specifically CVE-2026-58402 and CVE-2026-58403. One key issue is a cross-site scripting (XSS) vulnerability caused by improper escaping of Markdown code-fence language in Hugo's default code block renderer. This flaw could allow attackers to inject malicious scripts into web pages, potentially leading to arbitrary code execution in users' browsers. The advisory references Red Hat Hardened Images RPMs version 0.163.3-0.1.hum1 as affected. No explicit patch version is stated as fixed in the advisory, and no known exploits are reported in the wild. The severity is assessed as medium.

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. This issue is fixed in v0.163.1.