BIG-IP HTTP/2 vulnerability
Summary
| CVE | CVE-2026-59762 |
|---|---|
| State | PUBLISHED |
| Assigner | f5 |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-15 15:16:46 UTC |
| Updated | 2026-08-06 18:20:20 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 8.7 HIGH from [email protected]
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS: 0.003280000 probability, percentile 0.249070000 (date 2026-07-19)
Problem Types: CWE-770 | CWE-770 CWE-770: Allocation of Resources Without Limits or Throttling
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 8.7 | HIGH | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/C... |
| 4.0 | CNA | CVSS | 8.7 | HIGH | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| 3.1 | [email protected] | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | CVSS | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v4.0 Breakdown
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | F5 | Big-ip Next Cloud-native Network Functions | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | F5 | BIG-IP | affected 21.1.0 21.1.0.1 custom | Not specified |
| CNA | F5 | BIG-IP | affected 21.0.0 21.0.0.3 custom | Not specified |
| CNA | F5 | BIG-IP | affected 17.5.0 17.5.1.8 custom | Not specified |
| CNA | F5 | BIG-IP | affected 17.1.0 17.1.3.4 custom | Not specified |
| CNA | F5 | BIG-IP Next For Kubernetes | affected 2.3.0 2.3.2 custom | Not specified |
| CNA | F5 | BIG-IP Next For Kubernetes | affected 2.0.0 2.2.3 custom | Not specified |
| CNA | F5 | BIG-IP Next SPK | affected 1.9.0 * custom | Not specified |
| CNA | F5 | BIG-IP Next SPK | affected 1.7.0 1.7.18 custom | Not specified |
| CNA | F5 | BIG-IP Next CNF | affected 2.3.0 2.3.2 custom | Not specified |
| CNA | F5 | BIG-IP Next CNF | affected 2.0.0 2.2.3 custom | Not specified |
| CNA | F5 | BIG-IP Next CNF | affected 1.1.0 1.4.3 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| my.f5.com/manage/s/article/K000162231 | [email protected] | my.f5.com | Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: F5 acknowledges the Okta Red Team of Okta for bringing this issue to our attention and following the highest standards of coordinated disclosure. (en)