UnratedRed Hat & Ubuntu Linux
Highlight.js vulnerability
USN-8276-1 Published May 19, 2026
CVE-2020-26237
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
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. Affected Ubuntu releases: 20.04, 18.04, 16.04. CVEs: CVE-2020-26237.
Affected versions
- Ubuntu 20.04
- Ubuntu 18.04
- Ubuntu 16.04
Official advisory · medium-confidence parse· fetched 3 hours ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Apply available updates: `sudo apt update && sudo apt upgrade` (a standard system update installs the fix).
Official advisory · medium-confidence parse· fetched 3 hours ago·verify at source
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