High [CVE-2026-84469] Request validation bypass allows unauthorized operations
This high-severity Red Hat Linux advisory covers CVE-2026-84469 affecting Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI), Red Hat OpenShift Dev Spaces.
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Summary
A flaw was found in fastify. An unauthenticated remote attacker can bypass request validation by exploiting how fastify processes boolean false schemas.
When an application intends to deny all input by assigning 'false' to a route's schema, fastify incorrectly treats it as a missing schema and fails to compile a validator. This allows the attacker to reach handlers that should be unreachable, leading to unauthorized state changes or the execution of disabled operations.
Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N). Weakness: CWE-1287.
Affected Red Hat products: Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI); Red Hat OpenShift Dev Spaces. Red Hat does not currently list a fixing RHSA for this CVE.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
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