Is CVE-2026-54288 actively exploited?

No active exploitation of CVE-2026-54288 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-54288 be exploited remotely?

Yes. CVE-2026-54288 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-54288?

CVE-2026-54288 has a CVSS score of 6.5 (MEDIUM).

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MEDIUM

CVE-2026-54288

CWE-345Published: June 22, 2026· Updated: Jun 23, 2026

6.5

CVSS v3.1

EPSS:0.10%probability of exploitation in 30 daysPercentile:1.2th

Official Description

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, 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 client can declare a tiny Content-Length while sending a much larger body, slipping past the limit. This vulnerability is fixed in 4.12.25.

NVD Source

Technical Analysis

CVE-2026-54288 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.