CVE-2026-30226
devalue has prototype pollution in devalue.parse and devalue.unflatten
EPSS 0.14%
Description
In devalue v5.6.3, `devalue.parse` and `devalue.unflatten` were susceptible to prototype pollution via maliciously crafted payloads. Successful exploitation could lead to Denial of Service (DoS) or type confusion.
How to fix CVE-2026-30226
To remediate CVE-2026-30226, upgrade the affected package to a fixed version below.
- npm/devalue—upgrade to 5.6.4 or later
Is CVE-2026-30226 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 5.6.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |