How severe is CVE-2026-35166?

CVE-2026-35166 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-35166 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35166?

CVE-2026-35166 primarily affects Gohugo Hugo. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-35166?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-35166 have an EU (EUVD) identifier?

Yes. CVE-2026-35166 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19414.

When was CVE-2026-35166 published?

CVE-2026-35166 was published on 2026-04-06 and last updated on 2026-06-17.

CVE-2026-35166

CVE-2026-35166 is a medium-severity vulnerability in Gohugo Hugo with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v4: 5.3
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19414
Weakness: CWE-79
Affected product: Gohugo Hugo
Published: 2026-04-06
Last modified: 2026-06-17

Description

Hugo is a static site generator. From 0.60.0 to before 0.159.2, links and image links in the default markdown to HTML renderer are not properly escaped. Hugo users who trust their Markdown content or have custom render hooks for links and images are not affected. This vulnerability is fixed in 0.159.2.

Frequently asked questions

What is CVE-2026-35166?: Hugo is a static site generator. From 0.60.0 to before 0.159.2, links and image links in the default markdown to HTML renderer are not properly escaped. Hugo users who trust their Markdown content or have custom render hooks for links and images are not affected. This vulnerability is fixed in 0.159.2.
How severe is CVE-2026-35166?: CVE-2026-35166 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-35166 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35166?: CVE-2026-35166 primarily affects Gohugo Hugo. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-35166?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-35166 have an EU (EUVD) identifier?: Yes. CVE-2026-35166 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19414.
When was CVE-2026-35166 published?: CVE-2026-35166 was published on 2026-04-06 and last updated on 2026-06-17.

References

https://github.com/gohugoio/hugo/security/advisories/GHSA-mcv8-8m8x-48pg

Affected products (3)

cpe:2.3:a:gohugo:hugo:*:*:*:*:*:linux:*:*
cpe:2.3:a:gohugo:hugo:*:*:*:*:*:macos:*:*
cpe:2.3:a:gohugo:hugo:*:*:*:*:*:windows:*:*

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