Allocation of Resources Without Limits or Throttling in qs - CVE-2026-82562
Published: September 2, 2026
Vulnerability identifier: #VU146785
CSH Severity: Low
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-82562
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in the qs parser when processing bracket-key comma-separated query string or form body input with comma: true. A remote attacker can supply a specially crafted parameter to cause a denial of service.
A single parameter can materialize an arbitrarily large array, and the issue occurs because bracket-key input can bypass configured arrayLimit and throwOnLimitExceeded checks.
Affected software
qs
PowerVC
Fedora
IBM DataPower Gateway
nextcloud
PowerVC
Fedora
IBM DataPower Gateway
nextcloud
How to mitigate CVE-2026-82562
Install security update from vendor's website.
qs - update to 6.16.0
IBM DataPower Gateway - addressed in versions 10.5.0.23, 10.6.0.11, 11.0.0.3
nextcloud - addressed in versions 34.0.4-1.el10_2, 34.0.4-1.el10_4, 34.0.4-1.fc43, 34.0.4-1.fc44, 34.0.4-1.fc45
IBM DataPower Gateway - addressed in versions 10.5.0.23, 10.6.0.11, 11.0.0.3
nextcloud - addressed in versions 34.0.4-1.el10_2, 34.0.4-1.el10_4, 34.0.4-1.fc43, 34.0.4-1.fc44, 34.0.4-1.fc45