CVE-2022-31142
highpriority · track · 31EPSS 0.015 · 74 %ileEUUSEPSS · scored 2026-10-27
@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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (7)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-376v-xgjx-7mfrfastify-bearer-auth vulnerable to Timing Attack Vector2022-07-15ghsa · osvUS
### 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](https://github.com/fastify/fastify-bearer-auth) * Email us at [hello@matteocollina.com](mailto:hello@matteocollina.com)
also known as (3)
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sources
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references (16)
External citations — patches, advisories, analysis.
- https://cxsecurity.com/cveshow/CVE-2022-31142/cnnvd
- https://github.com/fastify/fastify-bearer-auth/commit/0c468a616d7e56126dc468150f6a5a92e530b8e4cnnvd
- https://github.com/fastify/fastify-bearer-auth/commit/39353b15409ee99474545f615ffb16180cf3b716cnnvd
- https://github.com/fastify/fastify-bearer-auth/commit/f921a0582dc83112039004a9b5041141b50c5b3fcnnvd
- https://github.com/fastify/fastify-bearer-auth/security/advisories/GHSA-376v-xgjx-7mfrcnnvd
- https://hackerone.com/reports/1633287cnnvd
- https://github.com/fastify/fastify-bearer-auth/commit/0c468a616d7e56126dc468150f6a5a92e530b8e4enisa_euvd
- https://github.com/fastify/fastify-bearer-auth/commit/39353b15409ee99474545f615ffb16180cf3b716enisa_euvd
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