npm Token Leak in npm
Affected versions of the npm package include the bearer token of the logged in user in every request made by the CLI, even if the request is not directed towards the user's active registry.
An attacker could create an HTTP server to collect tokens, and by various means including but not limited to install scripts, cause the npm CLI to make a request to that server, which would compromise the user's token.
This compromised token could be used to do anything that the user could do, including publishing new packages.
Recommendation
- Update npm with
npm install npm@latest -g - Revoke your Tokens
- Enable Two-Factor Authentication
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | npm | < 2.15.1, >= 3.0.0, < 3.8.3 | 2.15.1, 3.8.3 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2016-3956
- https://github.com/npm/npm/issues/8380
- https://github.com/npm/npm/commit/f67ecad59e99a03e5aad8e93cd1a086ae087cb29
- https://github.com/npm/npm/commit/fea8cc92cee02c720b58f95f14d315507ccad401
- https://github.com/advisories/GHSA-m5h6-hr3q-22h5
- https://nodejs.org/en/blog/vulnerability/npm-tokens-leak-march-2016
- https://www.npmjs.com/advisories/98
- http://blog.npmjs.org/post/142036323955/fixing-a-bearer-token-vulnerability
- http://www-01.ibm.com/support/docview.wss?uid=swg21980827
- Weakness (CWE)
CWE-200- Platform
- npm
- Package
npm- Disclosed
- 31.07.2018
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-m5h6-hr3q-22h5 - CC BY 4.0
Vulnerability history: npm
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 8
- First → latest
- 07.2018 06.2022
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 6
- Medium 1
- Low 1
Disclosures per year
- 2018: 1
- 2019: 3
- 2020: 2
- 2021: 0
- 2022: 2
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
-
npm Token Leak in npm this entry
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