CVE-2026-59762 F5 CVE debrief

Who should care

BIG-IP system administrators, security teams, and operators should be aware of this vulnerability and take necessary actions to mitigate it. They should review and apply vendor patches, implement compensating controls, and monitor memory resource utilization and TMM process health. Affected product deployments should be identified, and owners assigned for follow-up. The vulnerability allows a remote, unauthenticated attacker to cause a degradation of service that can lead to a denial-of-service (DoS). System performance can degrade until the TMM process is either forced to restart or is manually restarted. This issue is a data plane issue only, with no control plane exposure. The CVE record indicates that when an HTTP/2 profile is configured on a virtual server, undisclosed requests can cause an increase in memory resource utilization. System performance can degrade until the TMM process is either forced to restart or is manually restarted. This vulnerability allows a remote, unauthenticated attacker to cause a degradation of service that can lead to a denial-of-service (DoS) on the BIG-IP system. There is no control plane exposure; this is a data plane issue only. BIG-IP system administrators should prioritize patching, as a remote, unauthenticated attacker can cause a degradation of service that can lead to a denial-of-service (DoS). The CVE record was published on 2026-07-15T15:16:46.200Z and has not been modified since then. The NVD detail and vendor advisory provide additional information on the vulnerability. The source item URL provides additional context. Mitigation or vendor reference is available from F5. The CVE-2026-59762 CVE record provides additional information on the vulnerability. The NVD detail provides additional information on the vulnerability. The source item URL provides additional context. Vendor Advisory provides additional information on the vulnerability. The CVE record was published on 2026-07-15T15:16:46.200Z and has not been modified since then. The NVD detail and vendor advisory provide additional information on the vulnerability. The source item URL provides additional context. Mitigation or vendor reference is available from F5.

Technical summary

CVE-2026-59762 is a vulnerability in BIG-IP systems where undisclosed requests can cause an increase in memory resource utilization when an HTTP/2 profile is configured on a virtual server. This can lead to a degradation of service and potentially a denial-of-service (DoS). The issue is a data plane issue only, with no control plane exposure. A remote, unauthenticated attacker can exploit this vulnerability.

Defensive priority

BIG-IP system administrators should prioritize patching, as a remote, unauthenticated attacker can cause a degradation of service that can lead to a denial-of-service (DoS).

Recommended defensive actions

• Review and apply vendor patches for BIG-IP systems with HTTP/2 profiles configured.
• Implement compensating controls, such as monitoring memory resource utilization and TMM process health.
• Consider disabling HTTP/2 profiles if not required.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE-2026-59762 record indicates that when an HTTP/2 profile is configured on a virtual server, undisclosed requests can cause an increase in memory resource utilization. System performance can degrade until the TMM process is either forced to restart or is manually restarted. This issue is a data plane issue only, with no control plane exposure.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.