Is postcss-selector-parser 6.0 vulnerable?

npm · 17 releases from 6.0.0 to 6.0.16 · latest postcss-selector-parser is 7.1.7 · checked 1 Nov 2026

Yes: 1 known advisory

Yes. postcss-selector-parser 6.0.16, the last 6.0 release, is affected by 1 known security advisory (1 medium), including CVE-2026-104844. Upgrade to 6.1.5 or later to fix all of them.

Upgrade with: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.

Advisories affecting postcss-selector-parser 6.0.16

  • 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

Which of your client projects are still on postcss-selector-parser 6.0?

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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.