CVE-2026-54288
MEDIUM EPSS 1.2%
Published Jun 22, 20261w ago · Modified Jun 23, 20261w ago
6.5 CVSS 3.1
Published Jun 22, 2026 1w ago
Last Modified Jun 23, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability None
Threat Intelligence
EPSS Exploit Probability
1.2% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-345
References 1
- github.com https://github.com/honojs/hono/security/advisories/GHSA-rv63-4mwf-qqc2
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.