Fixed bug affecting npm package and organization maintainers

GitHub Security was recently notified about a caching issue affecting npm. This bug had been present since 2016 and sporadically caused npm maintainers to be re-invited upon removal from packages or organizations. Our Security team investigated potential instances of the issue and believe this bug only occurred if a user was removed, followed shortly by the addition of a different member. This bug affected npm-cli version 6 and above, and was fixed in version 7+.

Out of an abundance of caution, we are recommending all npm users review the maintainers of their projects and organizations for any discrepancies that may be a result of this bug and remove any unexpected members. Please feel free to reach out to us with any additional questions or concerns through the following contact form: https://www.npmjs.com/support.