CVE-2026-58402 Hugo default code block renderer XSS via unescaped code-fence language

Hugo is a static site generator. From 0.60.0 until 0.163.3, Hugo's default code-block renderer wrote the Markdown code-fence language or info-string into the code class="language-…" data-lang="…" wrapper without HTML escaping. A fence info-string containing a quote and a script payload breaks out...

CVE-2026-58402

Hugo (static site generator) from version 0.60.0 up to 0.163.3 is affected: its default code-block renderer writes the Markdown code-fence language/info-string into the code element wrapper (class="language-…", data-lang="…") without HTML escaping. A fence info-string containing a quote and a scr...

EUVD-2026-41904

Hugo is a static site generator. From 0.60.0 until 0.163.3, Hugo's default code-block renderer wrote the Markdown code-fence language or info-string into the code class="language-…" data-lang="…" wrapper without HTML escaping. A fence info-string containing a quote and a script payload breaks out...

CVE-2026-58402

Hugo is a static site generator. From 0.60.0 until 0.163.3, Hugo's default code-block renderer wrote the Markdown code-fence language or info-string into the code class="language-…" data-lang="…" wrapper without HTML escaping. A fence info-string containing a quote and a script payload breaks out...

CVE-2026-58404

Hugo is a static site generator. From v0.162.0 through v0.163.0, the default security.http.urls policy denies requests to loopback, internal, and cloud-metadata IPv4 literals, but the deny rule only matched dotted-decimal notation, so alternate IPv4 encodings of the same addresses, including...

CVE-2026-58404

Hugo is a static site generator. From v0.162.0 through v0.163.0, the default security.http.urls policy denies requests to loopback, internal, and cloud-metadata IPv4 literals, but the deny rule only matched dotted-decimal notation, so alternate IPv4 encodings of the same addresses, including...

CVE-2026-58404 Hugo security.http.urls deny rules bypassed by alternate IPv4 encodings

Hugo is a static site generator. From v0.162.0 through v0.163.0, the default security.http.urls policy denies requests to loopback, internal, and cloud-metadata IPv4 literals, but the deny rule only matched dotted-decimal notation, so alternate IPv4 encodings of the same addresses, including...

EUVD-2026-41918

Hugo is a static site generator. From v0.162.0 through v0.163.0, the default security.http.urls policy denies requests to loopback, internal, and cloud-metadata IPv4 literals, but the deny rule only matched dotted-decimal notation, so alternate IPv4 encodings of the same addresses, including...

CVE-2026-58404 Hugo security.http.urls deny rules bypassed by alternate IPv4 encodings

Hugo is a static site generator. From v0.162.0 through v0.163.0, the default security.http.urls policy denies requests to loopback, internal, and cloud-metadata IPv4 literals, but the deny rule only matched dotted-decimal notation, so alternate IPv4 encodings of the same addresses, including...

CVE-2026-58404

Hugo: From v0.162.0 to v0.163.0, the default security.http.urls policy blocked loopback/internal/cloud-metadata IPv4 literals, but the deny rule only matched dotted-decimal notation. Consequently, alternate IPv4 encodings (integer, hex, octal) could resolve to blocked addresses when a template pa...

CVE-2026-58404 Hugo security.http.urls deny rules bypassed by alternate IPv4 encodings

Hugo is a static site generator. From v0.162.0 through v0.163.0, the default security.http.urls policy denies requests to loopback, internal, and cloud-metadata IPv4 literals, but the deny rule only matched dotted-decimal notation, so alternate IPv4 encodings of the same addresses, including...

CVE-2026-58404: Server-Side Request Forgery (SSRF)

Hugo is a static site generator. From v0.162.0 through v0.163.0, the default security.http.urls policy denies requests to loopback, internal, and cloud-metadata IPv4 literals, but the deny rule only matched dotted-decimal notation, so alternate IPv4 encodings of the same addresses, including...

CVE-2026-50134: Server-Side Request Forgery (SSRF)

Hugo is a static site generator. From 0.91.0 until 0.162.0, resources.GetRemote enforces security.http.urls on the URL it is called with, but it did not re-validate intermediate URLs on HTTP 3xx redirects. An allowed server or an attacker controlling its DNS or response could therefore redirect t...

CVE-2026-50133: Improper Neutralization of Input During Web Page Generation

Hugo is a static site generator. Prior to 0.162.0, Hugo accepts content files in several markup formats. Files mapped to the text/html media type typically .html files under /content, or pages produced by a content adapter that sets content.mediaType = "text/html" had their body emitted verbatim...

CVE-2026-50135: Improper Link Resolution Before File Access

Hugo is a static site generator. From 0.123.0 to 0.161.1, a regression made RootMappingFs.statRoot use Stat follows symlinks instead of Lstat , so a direct resources.Get of a symlink pointing outside its mount returned the target's contents — letting a symlink planted in a local mount e.g. a...

CVE-2026-58402: Improper Neutralization of Input During Web Page Generation

Hugo is a static site generator. From 0.60.0 until 0.163.3, Hugo's default code-block renderer wrote the Markdown code-fence language or info-string into the code class="language-…" data-lang="…" wrapper without HTML escaping. A fence info-string containing a quote and a script payload breaks out...

CVE-2026-58403: Improper Link Resolution Before File Access

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...

GHSA-PWFV-328H-75X9 vulnerabilities

Vulnerabilities for packages: mailpit, seaweedfs-rocksdb, seaweedfs-rocksdb-fips, seaweedfs, hugo-fips, seaweedfs-fips, hugo, filebrowser, mattermost, rclone, rclone-fips, gitlab-workhorse-ce, hugo-extended, listmonk, mailpit-fips, seaweedfs-operator-fips, mattermost-fips, seaweedfs-operator...

CVE-2026-46602 vulnerabilities

Vulnerabilities for packages: mailpit, seaweedfs-rocksdb, seaweedfs-rocksdb-fips, seaweedfs, hugo-fips, seaweedfs-fips, hugo, filebrowser, mattermost, rclone, rclone-fips, gitlab-workhorse-ce, hugo-extended, listmonk, mailpit-fips, seaweedfs-operator-fips, mattermost-fips, seaweedfs-operator...

GHSA-C3WQ-J5VH-68RC Hugo: Symlink confinement bypass in os.ReadFile

Affected versions: v0.123.0 through v0.163.0. Earlier versions are not affected. Fixed in: v0.163.1. Severity: Medium. Requires the attacker to be able to place or convince a site author to place a symlink inside a mounted directory — for example, inside a locally-vendored theme under themes/...