PatchSiren cyber security CVE debrief

CVE-2026-59654 Apache Software Foundation CVE debrief

CVE-2026-59654 is a Missing Release of Resource after Effective Lifetime vulnerability in Apache CloudStack's scoped global configuration functionality. This issue affects various modules and plugins, potentially leading to a denial of service (DoS) scenario for the management server. The vulnerability exists in versions from 4.7.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0. Users should review their system configurations and upgrade to a fixed version to mitigate the risk. Limited detail is available on exploitability and affected systems, so defenders should verify system configurations, review logs for unusual resource usage, and monitor for denial of service (DoS) scenarios. Additional review of Apache CloudStack's scoped global configuration functionality and its impact on management server stability is necessary.

Vendor: Apache Software Foundation
Product: Apache CloudStack
CVSS: MEDIUM 6.8
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-08-21
Original CVE updated: 2026-08-21
Advisory published: 2026-08-21
Advisory updated: 2026-08-21

Who should care

Users of Apache CloudStack, particularly those running versions 4.7.0 through 4.20.3.0 and 4.21.0.0 through 4.22.1.0, should be aware of this vulnerability and take steps to mitigate the risk. This includes reviewing system configurations, monitoring for unusual behavior, and planning for upgrades to fixed versions. Security teams and operators managing Apache CloudStack deployments should prioritize this vulnerability due to its potential impact on service availability.

Technical summary

CVE-2026-59654 is a Missing Release of Resource after Effective Lifetime vulnerability in Apache CloudStack's scoped global configuration functionality. It affects various modules and plugins, potentially leading to a denial of service (DoS) scenario for the management server. The issue exists in versions from 4.7.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0. Users should review their system configurations and upgrade to a fixed version to mitigate the risk.

Defensive priority

Medium-priority defensive review recommended due to potential denial of service (DoS) scenario.

Recommended defensive actions

Upgrade to version 4.20.3.1 or 4.22.1.1 or later
Review Apache CloudStack configuration for potential resource leaks
Monitor for unusual management server behavior
Review compensating controls for exposed systems while remediation is scheduled and verified
Check relevant monitoring, detection, and logs for exposed assets that need extra review
Track exceptions, retest remediated assets, and close the item only after evidence is documented
Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

Evidence from official CVE and NVD sources indicates a Missing Release of Resource after Effective Lifetime vulnerability in Apache CloudStack. Limited detail available on exploitability and affected systems. Defenders should verify system configurations, review logs for unusual resource usage, and monitor for denial of service (DoS) scenarios. Additional review of Apache CloudStack's scoped global configuration functionality and its impact on management server stability is necessary.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-21T13:18:17.767Z and has not been modified since then.