Resource exhaustion in F5 Big-Ip
CVE-2026-59762
When an HTTP/2 profile is configured on a virtual server, undisclosed requests can cause an increase in memory resource utilization. Impact: 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. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
EPSS: 0.006 (44.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- F5 Big-ip — versions 21.1.0, 21.0.0, 17.5.0
- F5 Big-ip_next_cloud-native_network_functions — versions 2.3.0
- F5 Big-ip Next Cnf — versions 2.3.0, 2.0.0, 1.1.0
- F5 Big-ip Next For Kubernetes — versions 2.3.0, 2.0.0
- F5 Big-ip_next_for_kubernetes — versions 2.3.0
- F5 Big-ip_next_service_proxy_for_kubernetes
- F5 Big-ip Next Spk — versions 1.9.0, 1.7.0
Weakness classification (CWE)
References
- f5sirt@f5.com (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-59762?
- CVE-2026-59762 is a high-severity vulnerability in F5 Big-Ip, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-07-15.
- How severe is CVE-2026-59762?
- High severity. CVSS v3 base score is 7.5 out of 10.