StackPrism

npm package

esbuild 0.28.0 vulnerability, and the version that fixes it

esbuild 0.28.0 has 1 known vulnerability; 0.28.1 fixes it.

npm (opens in a new tab) describes it as “An extremely fast JavaScript and CSS bundler and minifier.”

Known vulnerabilities
1
None rated high or critical
Released
Apr 2, 2026
Latest is 0.28.2
Downloads last week
7.1M
2% of esbuild downloads
Licence
MIT
OpenSSF Scorecard
5/10
evanw/esbuild (opens in a new tab)
Pulls in
26 packages
Resolved by deps.dev

What to upgrade to

0.28.1 is the closest release with no known vulnerabilities.

  • 0.28.1Upgrade to this

    Fixes the known vulnerability. Released Jun 11, 2026.

    No known vulnerabilities

  • 0.28.2

    Newest 0.28.x release and the latest release. Released Aug 8, 2026.

    No known vulnerabilities

0.28.1 came out on Jun 11, 2026. A coding agent trained before then doesn’t know it exists, so it may suggest an older release. AI knowledge cutoff dates

Findings

Every advisory for esbuild 0.28.0

Known exploited first (CISA KEV), then by how likely they are to be exploited (FIRST EPSS), then by severity. Each id links to its OSV.dev record.

  1. LowGHSA-g7r4-m6w7-qqqr on OSV.dev (opens in a new tab)

    esbuild allows arbitrary file read when running the development server on Windows

    Fixed in 0.28.1. Published Jun 12, 2026.

Who is still on a vulnerable esbuild

35% of last week’s 303.5M esbuild downloads went to versions with known vulnerabilities.

From npm’s per-version download counts for the last 7 days, each version checked against OSV.dev. The versions checked cover over 99% of downloads.

Is esbuild the only one?

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How this page is checked

StackPrism asks OSV.dev which advisories affect exactly esbuild 0.28.0, merges duplicates filed under several ids, and ranks them with CISA’s Known Exploited Vulnerabilities list and FIRST EPSS. Release dates and deprecation come from deps.dev and npm. No AI writes this page: every sentence comes from that data, refreshed every few hours.

Last checked against npm, OSV.dev and deps.dev.