vulnerability
Ubuntu: USN-7693-1 (CVE-2022-24999): qs vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 8 | (AV:N/AC:L/Au:N/C:N/I:N/A:C) | Nov 26, 2022 | Jun 26, 2025 | Mar 27, 2026 |
Description
qs before 6.10.3, as used in Express before 4.17.3 and other products, allows attackers to cause a Node process hang for an Express application because an __ proto__ key can be used. In many typical Express use cases, an unauthenticated remote attacker can place the attack payload in the query string of the URL that is used to visit the application, such as a[__proto__]=b&a[__proto__]&a[length]=100000000. The fix was backported to qs 6.9.7, 6.8.3, 6.7.3, 6.6.1, 6.5.3, 6.4.1, 6.3.3, and 6.2.4 (and therefore Express 4.17.3, which has "deps: [email protected]" in its release description, is not vulnerable).
Solution
References
- CVE-2022-24999
- https://attackerkb.com/topics/CVE-2022-24999
- CWE-1321
- EUVD-EUVD-2022-7366
- UBUNTU-USN-7693-1
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-7366
- https://github.com/expressjs/express/releases/tag/4.17.3
- https://github.com/ljharb/qs/pull/428
- https://github.com/n8tz/CVE-2022-24999
- https://ubuntu.com/security/notices/USN-7693-1
- https://www.cve.org/CVERecord?id=CVE-2022-24999
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.