SB2026072196 - Insufficient verification of data authenticity in Hono

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Main Vulnerability Database SB2026072196

SB2026072196 - Insufficient verification of data authenticity in Hono

Published: July 21, 2026

Security Bulletin ID SB2026072196
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Insufficient verification of data authenticity (CVE-ID: CVE-2026-54288)

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

CVSSv4: 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]


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.


Remediation

Install update from vendor's website.

References