Hugo versions from v0.162.0 before v0.166.0 contain a case-sensitive validation flaw in the security.http.urls IP-literal deny rule that allows attackers to bypass restrictions. Attackers can use mixed-case URL schemes in resources.GetRemote calls to fetch from restricted IP addresses like localhost.

Hugo versions from v0.162.0 before v0.166.0 contain a case-sensitive validation flaw in the security.http.urls IP-literal deny rule that allows attackers to bypass restrictions. Attackers can use mixed-case URL schemes in resources.GetRemote calls to fetch from restricted IP addresses like localhost.

hugo: github.com/gohugoio/hugo: Hugo: Server-Side Request Forgery (SSRF) leading to information disclosure. github.com/gohugoio/hugo: Hugo: Stored Cross-Site Scripting via unescaped code-fence attribute values golang.org/x/image: golang.org/x/image: Denial of Service due to excessive memory allocation when parsing malicious font files github.com/gohugoio/hugo: Hugo: Arbitrary file read via symbolic link sandbox escape github.com/gohugoio/hugo: Hugo: Stored cross-site scripting via unescaped lineAnchors option github.com/gohugoio/hugo: Hugo: Information disclosure via symlinked mount roots github.com/gohugoio/hugo: Hugo: Security restriction bypass via mixed-case URL schemes github.com/gohugoio/hugo: Hugo: Cross-site scripting via unescaped HTML in Org Mode content

Affected: Ubuntu:16.04:LTS: hugo, Ubuntu:18.04:LTS: hugo, Ubuntu:20.04:LTS: hugo, Ubuntu:22.04:LTS: hugo, Ubuntu:Pro:24.04:LTS: hugo, Ubuntu:26.04:LTS: hugo

Hugo versions from v0.162.0 before v0.166.0 contain a case-sensitive validation flaw in the security.http.urls IP-literal deny rule that allows attackers to bypass restrictions. Attackers can use mixed-case URL schemes in resources.GetRemote calls to fetch from restricted IP addresses like localhost.