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Solution
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Fri, 04 Sep 2026 17:30:00 +0000
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| Metrics |
ssvc
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Fri, 04 Sep 2026 12:15:00 +0000
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| Weaknesses | CWE-289 | |
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threat_severity
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threat_severity
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Fri, 04 Sep 2026 11:45:00 +0000
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| First Time appeared |
Fastify
Fastify fastify |
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| Vendors & Products |
Fastify
Fastify fastify |
Fri, 04 Sep 2026 10:00:00 +0000
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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 |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: openjs
Published:
Updated: 2026-09-04T16:20:02.318Z
Reserved: 2026-08-19T09:33:54.670Z
Link: CVE-2026-76169
Updated: 2026-09-04T16:19:57.827Z
Status : Received
Published: 2026-09-04T10:17:12.020
Modified: 2026-09-04T17:16:57.903
Link: CVE-2026-76169
OpenCVE Enrichment
Updated: 2026-09-04T14:00:05Z