High severity · published Oct 20, 2026
CVE-2026-93441
IBM QRadar SIEM HTTP Receiver protocol is vulnerable to a denial of service
8.6
CVSS
0.3%
EPSS
No
On KEV
Description
IBM QRadar SIEM could allow a remote attacker to cause a denial of service due to uncontrolled resource consumption.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QS
QRadar Security Information and Event Management · IBM
7.4-20210823144546 through 7.5-20260930064858; 7.6-20260330053257 through 7.6-20260930064910 · source: vendor
Affected product
QS
QRadar Security Information and Event Management
IBM