Ubuntu USN · USN-8377-1

Template-Toolkit vulnerability

Published: Wed, 03 Jun 2026 13:24

CVE-2026-5090

Summary

Template-Toolkit could allow arbitrary HTML and JavaScript to be injected into generated output.

Details

It was discovered that Template-Toolkit did not properly escape single quotes in the html_filter function of Template::Plugin::HTML. An attacker could possibly use this issue to inject arbitrary HTML and JavaScript into generated output.

Recommended actions per Ubuntu release

StackPatch playbook auto-generated per release codename and per affected package.

Ubuntu jammy

libtemplate-perl→2.27-1ubuntu0.22.04.1apt_upgrade
Standard apt upgrade. Install 2.27-1ubuntu0.22.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libtemplate-perl
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libtemplate-perl→2.27-1ubuntu0.22.04.1apt_upgrade
Standard apt upgrade. Install 2.27-1ubuntu0.22.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libtemplate-perl
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu noble

libtemplate-perl→2.27-1ubuntu0.24.04.1apt_upgrade
Standard apt upgrade. Install 2.27-1ubuntu0.24.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libtemplate-perl
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libtemplate-perl→2.27-1ubuntu0.24.04.1apt_upgrade
Standard apt upgrade. Install 2.27-1ubuntu0.24.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libtemplate-perl
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu questing

libtemplate-perl→2.27-1ubuntu0.25.10.1apt_upgrade
Standard apt upgrade. Install 2.27-1ubuntu0.25.10.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libtemplate-perl
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libtemplate-perl→2.27-1ubuntu0.25.10.1apt_upgrade
Standard apt upgrade. Install 2.27-1ubuntu0.25.10.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libtemplate-perl
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu resolute

libtemplate-perl→3.102-1ubuntu0.1apt_upgrade
Standard apt upgrade. Install 3.102-1ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libtemplate-perl
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libtemplate-perl→3.102-1ubuntu0.1apt_upgrade
Standard apt upgrade. Install 3.102-1ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libtemplate-perl
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Are YOU affected by USN-8377-1?

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