fastify-bearer-auth vulnerable to Timing Attack Vector
Impact
fastify-bearer-auth does not securely use crypto.timingSafeEqual. A malicious attacker could estimate the length of one valid bearer token. According to the corresponding RFC 6750, the bearer token has only base64 valid characters, reducing the range of characters for a brute force attack.
All versions of fastify-bearer-auth are also affected.
Patches
We released:
- v8.0.1 with a fix for the Fastify v4 line
- v7.0.2 with a fix for the Fastify v3 line
Workarounds
There are no workarounds. Update your dependencies.
References
https://hackerone.com/reports/1633287
For more information
If you have any questions or comments about this advisory:
- Open an issue in https://github.com/fastify/fastify-bearer-auth
- Email us at hello@matteocollina.com
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @fastify/bearer-auth | < 7.0.2, >= 8.0.0, < 8.0.1 | 7.0.2, 8.0.1 |
| npm package | fastify-bearer-auth | >= 5.0.1, <= 6.0.3 | no fix |
References
- https://github.com/fastify/fastify-bearer-auth/security/advisories/GHSA-376v-xgjx-7mfr
- https://nvd.nist.gov/vuln/detail/CVE-2022-31142
- https://github.com/fastify/fastify-bearer-auth/commit/0c468a616d7e56126dc468150f6a5a92e530b8e4
- https://github.com/fastify/fastify-bearer-auth/commit/39353b15409ee99474545f615ffb16180cf3b716
- https://github.com/fastify/fastify-bearer-auth/commit/f921a0582dc83112039004a9b5041141b50c5b3f
- https://hackerone.com/reports/1633287
- https://github.com/fastify/fastify-bearer-auth
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-203, CWE-208- Platform
- npm
- Package
@fastify/bearer-auth, fastify-bearer-auth- Disclosed
- 15.07.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-376v-xgjx-7mfr - CC BY 4.0
Vulnerability history: @fastify/bearer-auth
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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