Vulnerability · Published Jul 15, 2026 · Assigned by f5
CVE-2026-59762BIG-IP HTTP/2 vulnerability
High 7.5
In plain English
A high-severity resource allocation without limits in BIG-IP from F5. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| F5 | BIG-IP | 21.1.0 – before 21.1.0.121.0.0 – before 21.0.0.317.5.0 – before 17.5.1.817.1.0 – before 17.1.3.4 |
| F5 | BIG-IP Next for Kubernetes | 2.3.0 – before 2.3.22.0.0 – before 2.2.3 |
| F5 | BIG-IP Next SPK | 1.9.0 – before *1.7.0 – before 1.7.18 |
| F5 | BIG-IP Next CNF | 2.3.0 – before 2.3.22.0.0 – before 2.2.31.1.0 – before 1.4.3 |
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://my.f5.com/manage/s/article/K000162231 vendor-advisory, patch