CVE-2026-84469

high Red Hat
CVSS v3 Base Score
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS Score
0.5%
Exploitation probability in 30 days
Top 58% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
High
Availability
None
Published: September 4, 2026 (2 days ago)
Last Modified: September 4, 2026
Vendor: Red Hat
Source: REDHAT

Description

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.

CWE

CWE-1287

Affected Products

Red Hat Enterprise Linux AI (RHEL AI) 3Red Hat OpenShift AI (RHOAI)Red Hat OpenShift Dev Spaces

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 cna.openjsf.org 🔗 github.com