CVE-2026-84504

high Red Hat
CVSS v3 Base Score
8.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS Score
0.4%
Exploitation probability in 30 days
Top 68% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Confidentiality
High
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 authenticated low-privilege caller can exploit a vulnerability where the framework incorrectly processes the result of an Ajv asynchronous (async) validator. If a request body contains a root-level property named 'value', fastify replaces the entire request body with this property's content, bypassing the intended schema validation. This can lead to unauthorized state changes and the disclosure of sensitive data, as the application handler receives an unvalidated object.

CWE

CWE-179

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