CVE-2022-24999

HIGH
Published Nov 26, 20223y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Nov 26, 2022 3y ago
Last Modified Jun 17, 2026 2w ago

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: qs@6.9.7" in its release description, is not vulnerable).

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-1321

Affected Products 11

VendorProductVersionRange
qs_projectqs* <6.2.4
qs_projectqs*≥6.3.0  –  <6.3.3
qs_projectqs*≥6.5.0  –  <6.5.3
qs_projectqs*≥6.7.0  –  <6.7.3
qs_projectqs*≥6.8.0  –  <6.8.3
qs_projectqs*≥6.9.0  –  <6.9.7
qs_projectqs*≥6.10.0  –  <6.10.3
qs_projectqs6.4.0any
qs_projectqs6.6.0any
openjsfexpress* <4.17.3
debiandebian_linux10.0any

References 5

  • github.com https://github.com/expressjs/express/releases/tag/4.17.3
    Release Notes
  • github.com https://github.com/ljharb/qs/pull/428
    Issue TrackingPatch
  • github.com https://github.com/n8tz/CVE-2022-24999
    ExploitThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2023/01/msg00039.html
    Mailing ListThird Party Advisory
  • security.netapp.com https://security.netapp.com/advisory/ntap-20230908-0005/

Remediation

  • github.com https://github.com/ljharb/qs/pull/428
    Issue TrackingPatch