========================================================================== Ubuntu Security Notice USN-8276-1 May 19, 2026
Highlight.js vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
Highlight.js could be made to crash if it received specially crafted
input.
Software Description:
- highlight.js: JavaScript syntax highlighter
Details:
It was discovered that Highlight.js used plain JavaScript objects for
internal language name lookups, making them susceptible to prototype
pollution attacks. An attacker could use this to cause a denial of
service or unexpected application behaviour.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS
libjs-highlight.js 9.12.0+dfsg1-5ubuntu0.1~esm1
Available with Ubuntu Pro
node-highlight.js 9.12.0+dfsg1-5ubuntu0.1~esm1
Available with Ubuntu Pro
Ubuntu 18.04 LTS
libjs-highlight.js 9.12.0+dfsg1-4ubuntu0.1~esm1
Available with Ubuntu Pro
node-highlight.js 9.12.0+dfsg1-4ubuntu0.1~esm1
Available with Ubuntu Pro
Ubuntu 16.04 LTS
libjs-highlight.js 8.2+ds-4ubuntu0.1~esm1
Available with Ubuntu Pro
node-highlight.js 8.2+ds-4ubuntu0.1~esm1
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8276-1
CVE-2020-26237
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