Is postcss-selector-parser 6.1 vulnerable?

npm · 6 releases from 6.1.0 to 6.1.5 · latest postcss-selector-parser is 7.1.7 · checked 2 Nov 2026

No known advisories in the last release

postcss-selector-parser 6.1.5, the last 6.1 release, has no known advisories. 2 advisories affect earlier 6.1.x releases, so update to 6.1.5.

Update within 6.1:npm install postcss-selector-parser@6.1.5

Is your project affected?

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

Fixed within 6.1.x, affecting earlier releases

  • MediumCVE-2026-104844GHSA-rj75-hqrm-r3gf5 Oct 2026

    PostCSS: Quadratic complexity in flat selector parsing allows CPU exhaustion

    Affected
    >=7.0.0 <7.1.6 · <6.1.5
    Fixed in
    6.1.5, 7.1.6
  • LowCVE-2026-9358GHSA-w9m9-85wc-3x9226 May 2026

    postcss-selector-parser allows denial of service through uncontrolled AST recursion

    Affected
    >=6.1.0 <6.1.3 · >=7.1.0 <7.1.3
    Fixed in
    6.1.3, 7.1.3

Which of your client projects are still on postcss-selector-parser 6.1?

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

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Other postcss-selector-parser 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.