Is css-what 5.0 vulnerable?

npm · 2 releases from 5.0.0 to 5.0.1 · latest css-what is 8.0.0 · checked 2 Nov 2026

No known advisories in the last release

css-what 5.0.1, the last 5.0 release, has no known advisories. 1 advisory affects earlier 5.0.x releases, so update to 5.0.1.

Update within 5.0:npm install css-what@5.0.1

Is your project affected?

Private repo? Upload its lockfile instead, or connect GitHub to check every repo.

Fixed within 5.0.x, affecting earlier releases

  • HighCVE-2021-33587GHSA-q8pj-2vqx-8ggc7 Jun 2021

    Denial of service in css-what

    Affected
    >=4.0.0 <5.0.1
    Fixed in
    5.0.1

Which of your client projects are still on css-what 5.0?

NPMscan reads the lockfiles in every GitHub repo you pick, finds the exact css-what version each one installs, and checks it against these advisories. Each finding comes with the command that fixes it.

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Other css-what versions

Advisory data from OSV.dev (opens OSV.dev in a new tab), which includes the GitHub Advisory Database. Release list from the npm registry. Refreshed daily.