What’s Vulnerable › Vulnerabilities

CVE-2024-21508

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-04-11 · updated 2026-06-17
• Weakness: CWE-94

Description

Versions of the package mysql2 before 3.9.4 are vulnerable to Remote Code Execution (RCE) via the readCodeFor function due to improper validation of the supportBigNumbers and bigNumberStrings values.

Affected products

• Mysql2: before 3.9.4 — fixed in 3.9.4

How to fix

Upgrade to a fixed version: Mysql2 3.9.4. Check the vendor advisory for mitigations.

References

• https://blog.slonser.info/posts/mysql2-attacker-configuration/
• https://github.com/sidorares/node-mysql2/blob/1609b5393516d72a4ae47196837317fbe75e0c13/lib/parsers/text_parser.js%23L14C10-L14C21
• https://github.com/sidorares/node-mysql2/commit/74abf9ef94d76114d9a09415e28b496522a94805
• https://github.com/sidorares/node-mysql2/pull/2572
• https://github.com/sidorares/node-mysql2/releases/tag/v3.9.4
• https://security.snyk.io/vuln/SNYK-JS-MYSQL2-6591085
• https://blog.slonser.info/posts/mysql2-attacker-configuration/
• https://github.com/sidorares/node-mysql2/blob/1609b5393516d72a4ae47196837317fbe75e0c13/lib/parsers/text_parser.js%23L14C10-L14C21
• https://github.com/sidorares/node-mysql2/commit/74abf9ef94d76114d9a09415e28b496522a94805
• https://github.com/sidorares/node-mysql2/pull/2572
• https://github.com/sidorares/node-mysql2/releases/tag/v3.9.4
• https://security.snyk.io/vuln/SNYK-JS-MYSQL2-6591085

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