What’s Vulnerable › Vulnerabilities

CVE-2020-36429

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-20 · updated 2026-06-17
• Weakness: CWE-787

Description

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

Affected products

• open62541: from 1.0.0 before 1.0.4 — fixed in 1.0.4

How to fix

Upgrade to a fixed version: open62541 1.0.4. Check the vendor advisory for mitigations.

References

• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20578
• https://github.com/google/oss-fuzz-vulns/blob/main/vulns/open62541/OSV-2020-153.yaml
• https://github.com/open62541/open62541/commit/c800e2987b10bb3af6ef644b515b5d6392f8861d
• https://github.com/open62541/open62541/compare/v1.0.3...v1.0.4
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20578
• https://github.com/google/oss-fuzz-vulns/blob/main/vulns/open62541/OSV-2020-153.yaml
• https://github.com/open62541/open62541/commit/c800e2987b10bb3af6ef644b515b5d6392f8861d
• https://github.com/open62541/open62541/compare/v1.0.3...v1.0.4

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