CVE-2026-109597

Medium

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.

SeverityMedium

CVSS5.4

Exploit probability—

Product

Hugo

PublishedOct 12, 2026

First seenOct 12, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

gohugoio hugo0.167.0 or later

Vendor advisories

github.com/gohugoio/hugo/security/advisories/GHSA-wcpj-vcvm-j4pg

Affected products

Product	Affected versions	Fixed in
gohugoio hugo	0.60.0 ≤ v < 0.167.0	0.167.0

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