MajorCritical vulnerability
CVE-2026-123569 (CVSS 8.7)
NVD · officialPublished Nov 8, 2026Risk 37/100EPSS 0.3%
The devalue package for npm before 5.6.3 can consume excessive CPU and memory when serializing sparse arrays with uneval or stringify. An attacker who manages to get a sparse array created on the server, which mainstream wire formats do not allow, and serialized there can cause a denial of service.
Technical details
CVSS
8.7
AV:NetworkAC:LowPR:NoneUI:None
Evidence and sources
This record is attributed to NVD. Exploitation status and remediation guidance are kept separate from the vulnerability's technical severity.
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