CVE-2021-44907
qs: Insufficient sanitization of property in the gs.parse function
Severity
UnknownRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · March 18, 2022
Updated · June 28, 2026
Description
[REJECTED CVE] A Denial of Service (DoS) vulnerability was identified in QS due to insufficient sanitization of properties in the gs.parse function. The merge() function allows assigning properties to an array in a query, which could unexpectedly convert array values into objects. If the expected type is an array, and it's not checked with Array.isArray(), it can lead to unexpected behavior. An attacker could exploit this by manipulating query inputs, causing the application to crash or behave incorrectly.
Statement
This CVE has been rejected upstream - https://github.com/ljharb/qs/issues/436#issuecomment-1067538394
Red Hat has also evaluated this issue and determined that it does not meet the criteria to be classified as a security vulnerability. This assessment is based on the issue not posing a significant security risk, being a result of misconfiguration or usage error, or falling outside the scope of security considerations.
As such, this CVE has been marked as "Rejected" in alignment with Red Hat's vulnerability management policies.
If you have additional information or concerns regarding this determination, please contact Red Hat Product Security for further clarification.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 0CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
CWE-20 · Improper Input Validation