Insufficient verification of data authenticity in hono - CVE-2026-54288
Published: July 21, 2026
Vulnerability identifier: #VU138920
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-54288
CWE-ID: CWE-345
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to the Body Limit Middleware trusts the request's Content-Length header to decide whether a body is within the limit. On AWS Lambda (API Gateway v1/v2, ALB, VPC Lattice, and Lambda@Edge) the body is delivered fully buffered and the adapter builds the request with the client-declared Content-Length, which need not match the actual payload. A remote attacker can declare a tiny Content-Length while sending a much larger body, slipping past the limit.
Affected software
hono
Informix Dynamic Server
IBM App Connect Enterprise
Informix Dynamic Server
IBM App Connect Enterprise
How to mitigate CVE-2026-54288
Install updates from vendor's website.
hono - update to 4.12.25
Informix Dynamic Server - addressed in versions 14.10.FC14, 15.0.1.14
IBM App Connect Enterprise - update to 13.0.8.0
Informix Dynamic Server - addressed in versions 14.10.FC14, 15.0.1.14
IBM App Connect Enterprise - update to 13.0.8.0