CVE-2026-109597CWE-79cross-site-scripting

CVE-2026-109597

Medium · published October 13, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
5.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
5.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00168 · 5.8th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-10-13T03:17Z
References (2)
https://github.com/gohugoio/hugo/security/advisories/GHSA-wcpj-vcvm-j4pg · [email protected]https://www.vulncheck.com/advisories/hugo-0.60.0-before-0.167.0-stored-xss-via-table-of-contents-heading-ids · [email protected]
EPSS history
Timeline
  • 14 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 12 OCT 22:21Z
    Hugo v0.60.0 before v0.167.0 Stored XSS via Table of Contents Heading IDs
    cvelistv5
  • 12 OCT 22:21Z
    Hugo v0.60.0 before v0.167.0 Stored XSS via Table of Contents Heading IDs
    cvelistv5