High [CVE-2026-59762] BIG-IP: When an HTTP/2 profile is configured on a virtual server, undisclosed requests can cause an increase in memory resource utilization
This high-severity F5 advisory covers CVE-2026-59762 affecting BIG-IP, BIG-IP Next for Kubernetes, BIG-IP Next SPK.
Android app · Google Play
Monitor future F5 CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Summary
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 named by the advisory: BIG-IP Next for Kubernetes; BIG-IP Next SPK; BIG-IP Next CNF.
- BIG-IP 21.1.0 before 21.1.0.1
- BIG-IP 21.0.0 before 21.0.0.3
- BIG-IP 17.5.0 before 17.5.1.8
- BIG-IP 17.1.0 before 17.1.3.4
- BIG-IP Next for Kubernetes 2.3.0 before 2.3.2
- BIG-IP Next for Kubernetes 2.0.0 before 2.2.3
- BIG-IP Next SPK 1.9.0
- BIG-IP Next SPK 1.7.0 before 1.7.18
- BIG-IP Next CNF 2.3.0 before 2.3.2
- BIG-IP Next CNF 2.0.0 before 2.2.3
- BIG-IP Next CNF 1.1.0 before 1.4.3
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- 21.1.0.1
- 21.0.0.3
- 17.5.1.8
- 17.1.3.4
- 2.3.2
- 2.2.3
- 1.7.18
- 1.4.3
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation
Upgrade to a fixed release: 21.1.0.1, 21.0.0.3, 17.5.1.8, 17.1.3.4, 2.3.2, 2.2.3. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.