fastify vulnerable to authentication bypass via malformed URLs reaching encapsulated not-found handlers
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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No data.
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| Fastify | Fastify |
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| Source | ID | Title |
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Github GHSA |
GHSA-p68q-wchp-6fh7 | fastify vulnerable to authentication bypass via malformed URLs reaching encapsulated not-found handlers |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.530% probability within 30 days)
| Type | Values Removed | Values Added |
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| CPEs | cpe:2.3:a:fastify:fastify:*:*:*:*:*:node.js:*:* |
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
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| Weaknesses | CWE-289 | |
| References |
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| Metrics |
threat_severity
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threat_severity
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| First Time appeared |
Fastify
Fastify fastify |
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| Vendors & Products |
Fastify
Fastify fastify |
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| Description | fastify versions >= 4.0.0 and before 5.12.2 can route a malformed URL sent under one plugin prefix to the custom not-found handler of a different sibling plugin, and invoke it without the preHandler hook declared for that handler. The internal not-found router for encapsulated handlers dispatches malformed paths through a single shared handler pointer before URL decoding, ignoring the prefix and skipping the selected handler's normal lifecycle. An unauthenticated attacker can therefore reach an authentication-protected private fallback through an unrelated public prefix and read its full response, bypassing the authentication hook and breaking prefix encapsulation. Users should upgrade to fastify 5.12.2 or later. | |
| Title | fastify vulnerable to authentication bypass via malformed URLs reaching encapsulated not-found handlers | |
| Weaknesses | CWE-288 | |
| References |
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| Metrics |
cvssV3_1
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