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effect

1 known vulnerability (1 high), with the versions each affects and the releases that fix them.

Latest release
4.1.2 (Nov 2, 2026): no advisory affects it
Newest unaffected release
4.1.2 (Nov 2, 2026), the latest release
Advisories
1 · 1 high
Weekly downloads
66.8M
Dependents
422
Releases
497 since 2.0.0 (Jan 3, 2024)
Registry
npm
Releases read
Nov 8, 2026

Version timeline

  • CVE-2026-32887
    Affects 0.0.0-snapshot-0a6088b73485a0602ff216faac09f40877bc31d5 to 3.19.19 (3.20.0 is outside it)
Every release cve.now has on record, lowest version on the left; each bar is a run of versions an advisory affects.

Advisories 1

  • Effect Bug: `AsyncLocalStorage` context lost/contaminated inside Effect fibers under concurrent load with RPC

    Affected: fixed in 3.20.0.

    Fixed in 3.20.0 (released Mar 16, 2026, 4 days before disclosure).

    The latest release, 4.1.2, is not affected.

    9% of effect downloads last week were affected versions (6.3M).