fastify vulnerable to header validation bypass via case-sensitive propertyNames
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| fastify | fastify | unaffected |
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| Fastify | Fastify |
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| Source | ID | Title |
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Github GHSA |
GHSA-389g-gv7q-r4x8 | fastify is vulnerable to header validation bypass via case-sensitive propertyNames |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.257% probability within 30 days)
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threat_severity
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| First Time appeared |
Fastify
Fastify fastify |
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Fastify
Fastify fastify |
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| Description | fastify is a fast and low overhead web framework for Node.js. In versions 5.12.2 through 5.12.5, the routine that lowercases header names declared in a route schema does not lowercase the enum or const header names nested inside a propertyNames subschema. As a result, a header allow-list or deny-list written with canonical (non-lowercase) casing never matches the incoming lowercased header, so a restricted header passes validation and reaches the route handler. An attacker can therefore bypass a case-sensitive header validation rule and smuggle a forbidden header past the schema, affecting the integrity of request handling. The issue is fixed in fastify 5.12.6, and users should upgrade to 5.12.6 or later. There is no workaround other than upgrading, though applications can declare header names in lowercase to avoid the mismatch. | |
| Title | fastify vulnerable to header validation bypass via case-sensitive propertyNames | |
| Weaknesses | CWE-178 | |
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| Metrics |
cvssV3_1
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