Resource exhaustion in devalue - #VU127520
Published: April 24, 2026
Vulnerability identifier: #VU127520
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Rich Harris
Affected software:
devalue
devalue
Detailed vulnerability description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in uneval and stringify when serializing sparse arrays. A remote user can create a sparse array on the server and have it processed to cause a denial of service.
This issue results in denial of service when the affected code is used on the server.
Remediation
Install security update from vendor's website.