Review reviewHigh

CVE-2026-25223

fastify fastify, Red Hat OpenShift AI 2.16, Red Hat OpenShift AI 2.25

Fastify is a fast and low overhead web framework, for Node.js. Prior to version 5.7.2, a validation bypass vulnerability exists in Fastify where request body validation schemas specified by Content-Type can be completely circumvented. By appending a tab character (\t) followed by arbitrary content to the Content-Type header, attackers can bypass body validation while the server still processes the body as the original content type. This issue has been patched in version 5.7.2.

CVSS: 7.5
EPSS: 0.77%
CISA KEV: Not listed
Published: 2026.02.04

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.77%

Technical severityCVSS 7.5

Vulnerability overview

Affected product and versions

Product: fastify fastify, Red Hat OpenShift AI 2.16, Red Hat OpenShift AI 2.25
Affected versions: >= < 5.7.2, < 5.7.2
Fixed versions: 5.7.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that fastify fastify, Red Hat OpenShift AI 2.16, Red Hat OpenShift AI 2.25 and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE: CWE-179, CWE-436