CVE-2026-35166 is a medium-severity flaw (CVSS 5.4) affecting hugo, hugo, hugo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
Published CVE record published
Updated Record last modified
gohugo hugo UPGRADE
Affected: >= 0.60.0 and < 0.159.2
Fixed in: 0.159.2
Safe to downgrade to: a release before 0.60.0
1. Check installed version
apt-cache policy hugo || rpm -q hugo || hugo --version
2. UPGRADE to 0.159.2 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade hugo
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade hugo
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 0.60.0 (Debian / Ubuntu)
apt-cache madison hugo
sudo apt install hugo=<VERSION_BEFORE_0.60.0>
sudo apt-mark hold hugo
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list hugo
sudo dnf downgrade hugo-<VERSION_BEFORE_0.60.0>
sudo dnf versionlock add hugo
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
gohugo hugo UPGRADE
Affected: >= 0.60.0 and < 0.159.2
Fixed in: 0.159.2
Safe to downgrade to: a release before 0.60.0
1. Check installed version
apt-cache policy hugo || rpm -q hugo || hugo --version
2. UPGRADE to 0.159.2 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade hugo
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade hugo
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 0.60.0 (Debian / Ubuntu)
apt-cache madison hugo
sudo apt install hugo=<VERSION_BEFORE_0.60.0>
sudo apt-mark hold hugo
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list hugo
sudo dnf downgrade hugo-<VERSION_BEFORE_0.60.0>
sudo dnf versionlock add hugo
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
gohugo hugo UPGRADE
Affected: >= 0.60.0 and < 0.159.2
Fixed in: 0.159.2
Safe to downgrade to: a release before 0.60.0
1. Check installed version
apt-cache policy hugo || rpm -q hugo || hugo --version
2. UPGRADE to 0.159.2 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade hugo
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade hugo
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 0.60.0 (Debian / Ubuntu)
apt-cache madison hugo
sudo apt install hugo=<VERSION_BEFORE_0.60.0>
sudo apt-mark hold hugo
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list hugo
sudo dnf downgrade hugo-<VERSION_BEFORE_0.60.0>
sudo dnf versionlock add hugo
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Verify at the official sourceNVD · CVE Program · Report a problem with this page Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-35166?
hugo: upgrade to 0.159.2; hugo: upgrade to 0.159.2; hugo: upgrade to 0.159.2. Exact commands for each OS are on this page.
Is CVE-2026-35166 being exploited?
CVE-2026-35166 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-35166 affect?
CVE-2026-35166 affects hugo, hugo, hugo. Severity is medium (CVSS 5.4). 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 i
How urgent is CVE-2026-35166?
Priority 22/100. No elevated risk signals yet.
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