What’s Vulnerable › Vulnerabilities

CVE-2020-1947

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 33.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-03-11 · updated 2026-06-17
• Weakness: CWE-502

Description

In Apache ShardingSphere(incubator) 4.0.0-RC3 and 4.0.0, the ShardingSphere's web console uses the SnakeYAML library for parsing YAML inputs to load datasource configuration. SnakeYAML allows to unmarshal data to a Java type By using the YAML tag. Unmarshalling untrusted data can lead to security flaws of RCE.

Affected products

• Apache Software Foundation Apache ShardingSphere-Proxy: 4.0.0, 4.0.0-rc3

References

• https://lists.apache.org/thread.html/r4a61a24c119bd820da6fb02100d286f8aae55c8f9b94a346b9bb27d8%40%3Cdev.shardingsphere.apache.org%3E
• https://lists.apache.org/thread.html/r4a61a24c119bd820da6fb02100d286f8aae55c8f9b94a346b9bb27d8%40%3Cdev.shardingsphere.apache.org%3E

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