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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.006 (46.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
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
- my.f5.com/manage/s/article/K000162231 (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.