Is protobufjs 8.6 vulnerable?

npm · 7 releases from 8.6.0 to 8.6.6 · latest protobufjs is 8.8.1 · checked 1 Nov 2026

No known advisories in the last release

protobufjs 8.6.6, the last 8.6 release, has no known advisories. 2 advisories affect earlier 8.6.x releases, so update to 8.6.6.

Update within 8.6:npm install protobufjs@8.6.6

Is your project affected?

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

Fixed within 8.6.x, affecting earlier releases

  • MediumCVE-2026-59876GHSA-jfj6-75fj-893420 Jul 2026

    protobufjs: Text Format string map parsing can mutate returned map object prototype

    Affected
    >=8.2.0 <8.6.5
    Fixed in
    8.6.5
  • MediumCVE-2026-59877GHSA-j3f2-48v5-ccww20 Jul 2026

    protobufjs: Denial of Service via infinite loop in .proto option parsing

    Affected
    >=7.5.0 <7.6.5 · >=8.0.0 <8.6.6
    Fixed in
    7.6.5, 8.6.6

Which of your client projects are still on protobufjs 8.6?

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

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Other protobufjs 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.