Is CVE-2026-109597 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-109597?

CVE-2026-109597 has a CVSS v3 severity of MEDIUM (5.4).

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CVE-2026-109597

Description

Hugo from v0.60.0 before v0.167.0 contains a stored cross-site scripting vulnerability that allows Markdown content authors to inject HTML by supplying crafted explicit heading IDs. Attackers can break out of the unescaped href attribute in .TableOfContents or .Fragments.ToHTML output to inject elements with event handlers into rendered pages.