Description
@fastify/bearer-auth is a Fastify plugin to require bearer Authorization headers. @fastify/bearer-auth prior to versions 7.0.2 and 8.0.1 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. Version 7.0.2 and 8.0.1 of @fastify/bearer-auth contain a patch. There are currently no known workarounds. The package fastify-bearer-auth, which covers versions 6.0.3 and prior, is also vulnerable starting at version 5.0.1. Users of fastify-bearer-auth should upgrade to a patched version of @fastify/bearer-auth.
References (5)
Core 5
Core References
Third Party Advisory x_refsource_confirm
https://github.com/fastify/fastify-bearer-auth/security/advisories/GHSA-376v-xgjx-7mfr
Patch, Third Party Advisory x_refsource_misc
https://github.com/fastify/fastify-bearer-auth/commit/0c468a616d7e56126dc468150f6a5a92e530b8e4
Patch, Third Party Advisory x_refsource_misc
https://github.com/fastify/fastify-bearer-auth/commit/39353b15409ee99474545f615ffb16180cf3b716
Patch, Third Party Advisory x_refsource_misc
https://github.com/fastify/fastify-bearer-auth/commit/f921a0582dc83112039004a9b5041141b50c5b3f
Permissions Required, Third Party Advisory x_refsource_misc
https://hackerone.com/reports/1633287
Scores
CVSS v3
7.5
EPSS
0.0112
EPSS Percentile
61.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-208
CWE-203
Status
published
Products (4)
fastify/bearer-auth
8.0.0
fastify/bearer-auth
0 - 7.0.2npm
fastify/bearer-auth
5.0.1 - 7.0.2
npm/fastify-bearer-auth
5.0.1npm
Published
Jul 14, 2022
Tracked Since
Feb 18, 2026