CVE-2026-59762
BIG-IP HTTP/2 vulnerability
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-770 |
| Vendor | f5 |
| Product | big-ip |
| Published | Jul 15, 2026 |
| Last Updated | Jul 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
F5 / BIG-IP
21.1.0 < 21.1.0.1 21.0.0 < 21.0.0.3 17.5.0 < 17.5.1.8 17.1.0 < 17.1.3.4
F5 / BIG-IP Next for Kubernetes
2.3.0 < 2.3.2 2.0.0 < 2.2.3
F5 / BIG-IP Next SPK
1.9.0 < * 1.7.0 < 1.7.18
F5 / BIG-IP Next CNF
2.3.0 < 2.3.2 2.0.0 < 2.2.3 1.1.0 < 1.4.3
Credits
🔍 F5 acknowledges the Okta Red Team of Okta for bringing this issue to our attention and following the highest standards of coordinated disclosure.