css parser vulnerabilities and fixes

Recent CVEs affecting css parser, with upgrade or downgrade steps. 1 tracked.

Also searched as: cssparser.

css parser has 1 tracked vulnerability, 0 critical. A fixed release or vendor patch exists for 1. Most recent: 2026-07-17. Highest priority: CVE-2026-53727 (score 51/100).

• CVE-2026-53727 HIGH 8.6 DOWNGRADE css_parser is a Ruby CSS parser

FAQ

How do I fix css parser vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is css parser being exploited right now?

None of the tracked css parser CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which css parser CVE should I patch first?

CVE-2026-53727 currently ranks highest (51/100): css_parser is a Ruby CSS parser.

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