SB20260721144 - Use of less trusted source in Hono

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Main Vulnerability Database SB20260721144

SB20260721144 - Use of less trusted source in Hono

Published: July 21, 2026

Security Bulletin ID SB20260721144
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) Use of Less Trusted Source (CVE-ID: CVE-2026-54289)

CWE-ID: CWE-348 - Use of Less Trusted Source

CVSSv4: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to gain access to sensitive data.

The vulnerability exists due to on AWS Lambda@Edge, CloudFront delivers a request header that appears more than once as several separate entries. The adapter writes each value with Headers.set instead of Headers.append, so every value overwrites the previous one and only the last reaches the application. Repeated request headers such as X-Forwarded-For, Forwarded, and Via are silently truncated to a single value. Request middleware sees only the last value of a repeated header instead of the full chain. For applications that base access control on the X-Forwarded-For chain, this can weaken or alter that decision; for auditing, hop history is lost. A remote attacker can trigger the use of a less trusted source to gain access to sensitive data.


Remediation

Install update from vendor's website.

References