Resource exhaustion in hono - #VU146048
Published: August 28, 2026
Vulnerability identifier: #VU146048
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in parseBody() when processing request bodies with dot-notation enabled. A remote attacker can send specially crafted requests to cause a denial of service.
Only applications that explicitly enable dot-notation parsing are affected. Concurrent requests can exhaust the JavaScript heap and terminate the server process.
Affected software
hono
Remediation
Install security update from vendor's website.
hono - update to 4.13.5