CVE-2024-21508

mysql2 Remote Code Execution (RCE) via the readCodeFor function

9.8 CriticalFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

2.55%Up 2.5 points since Apr 11, 2024

What each source reports

CVE List Score used 9.8

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.

Record: CVE-2024-21508
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P
Weakness: CWE-94
Updated: 2026-11-02

EUVDEUVD-2024-1197 9.8

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.

Record: EUVD-2024-1197
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P
Updated: 2026-11-03

GitHub AdvisoriesGHSA-fpw7-j2hg-69v5 9.8

mysql2 Remote Code Execution (RCE) via the readCodeFor function

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.

Record: GHSA-fpw7-j2hg-69v5
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-94
Updated: 2026-11-02

NVD 9.8

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.

Record: CVE-2024-21508
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-94
Updated: 2026-11-02

OSV 9.8

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.

Record: CVE-2024-21508
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P
Weakness: CWE-94
Updated: 2026-11-02

OSVGHSA-fpw7-j2hg-69v5 9.8

mysql2 Remote Code Execution (RCE) via the readCodeFor function

Record: GHSA-fpw7-j2hg-69v5
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-94
Updated: 2026-11-02

OSVCLSA-2026-1773274566 No score

TuxCare security update for mysql2 (3 CVEs)

TuxCare rebuilt mysql2 to address 3 CVEs. Fixed in 2.3.3-tuxcare.2.

Record: CLSA-2026-1773274566
Updated: 2026-11-02

OSVROOT-APP-NPM-CVE-2024-21508 No score

CVE-2024-21508 in mysql2 - Patched by Root

Root has patched CVE-2024-21508 in the mysql2 package for Root:npm. Multiple fixed versions available.

Record: ROOT-APP-NPM-CVE-2024-21508
Updated: 2026-11-02

Affected products

mysql2

Affected packages

Affected packages
Package	Affected	Fixed
`mysql2` npm	before 3.9.4	3.9.4
`mysql2` TuxCare:npm From an advisory covering 3 CVEs	2.3.3-tuxcare.0 up to 2.3.3-tuxcare.2, plus listed versions 2.3.32.3.3-tuxcare.1	2.3.3-tuxcare.2
`mysql2` Root:npm	before 2.3.3-aikido.3	2.3.3-aikido.33.7.1-aikido.43.9.2-aikido.13.9.2-aikido.22.3.3-aikido.43.7.1-aikido.23.7.1-aikido.3
`@rootio/mysql2` Root:npm	before 2.3.3-root.io.2	2.3.3-root.io.22.3.3-root.io.12.3.3-root.io.33.7.1-root.io.43.9.2-root.io.13.9.2-root.io.22.3.3-root.io.43.7.1-root.io.23.7.1-root.io.3

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2024-21508 is a critical vulnerability (CVSS 9.8) in Mysql2, published April 11, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.55%, the 85th percentile. Fixed in mysql2 3.9.4.

References

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