CVE-2020-36429: OPEN62541

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Variant_encodeJson in open62541 1.x before 1.0.4 has an out-of-bounds write for a large recursion depth.

Affected products

• OPEN62541 OPEN62541: from 1.0.0, before 1.0.4 (fixed in 1.0.4)

Published 2021-07-20. Last modified 2026-06-17.