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High 7.5Published May 13, 2026
CVE-2026-42409BIG-IP HTTP/2 vulnerability
Updated under an hour ago ()
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It affects F5 BIG-IP and 26 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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When an HTTP/2 profile and an iRule containing the HTTP::redirect or HTTP::respond command are configured on a virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-476
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- f5
- NVD analysis
- Analyzed
- Record last updated
- May 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
F5 BIG-IP f5:big_ip (from the name) | from 21.1.0 not affected; from 21.0.0 before 21.0.0.1; from 17.5.0 before 17.5.1.4; from 17.1.0 before 17.1.3.1; from 16.1.0 | CNA record |
F5 BIG-IP Next SPK f5:big_ip_next_spk (from the name) | from 2.0.0 before 2.0.3; from 1.7.0 before 1.7.17 | CNA record |
F5 BIG-IP Next CNF f5:big_ip_next_cnf (from the name) | from 2.0.0 before 2.0.3; from 1.4.0 before 1.4.1 | CNA record |
F5 BIG-IP Next for Kubernetes f5:big_ip_next_for_kubernetes (from the name) | from 2.0.0 before 2.1.1 | CNA record |
f5 big-ip_next_cloud-native_network_functions f5:big-ip_next_cloud-native_network_functions | from 1.1.0 through 1.4.0; from 2.0.0 through 2.0.2 | NVD |
f5 big-ip_next_for_kubernetes f5:big-ip_next_for_kubernetes | from 2.0.0 through 2.1.0 | NVD |
f5 big-ip_access_policy_manager f5:big-ip_access_policy_manager | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_advanced_firewall_manager f5:big-ip_advanced_firewall_manager | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_advanced_web_application_firewall f5:big-ip_advanced_web_application_firewall | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_analytics f5:big-ip_analytics | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_application_acceleration_manager f5:big-ip_application_acceleration_manager | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_application_security_manager f5:big-ip_application_security_manager | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_application_visibility_and_reporting f5:big-ip_application_visibility_and_reporting | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_automation_toolchain f5:big-ip_automation_toolchain | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_carrier-grade_nat f5:big-ip_carrier-grade_nat | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_container_ingress_services f5:big-ip_container_ingress_services | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_ddos_hybrid_defender f5:big-ip_ddos_hybrid_defender | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_domain_name_system f5:big-ip_domain_name_system | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_edge_gateway f5:big-ip_edge_gateway | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_fraud_protection_service f5:big-ip_fraud_protection_service | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_global_traffic_manager f5:big-ip_global_traffic_manager | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_link_controller f5:big-ip_link_controller | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_local_traffic_manager f5:big-ip_local_traffic_manager | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_policy_enforcement_manager f5:big-ip_policy_enforcement_manager | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_ssl_orchestrator f5:big-ip_ssl_orchestrator | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_webaccelerator f5:big-ip_webaccelerator | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
f5 big-ip_websafe f5:big-ip_websafe | 21.0.0; from 16.1.0 through 16.1.6; from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1 | NVD |
References
- https://my.f5.com/manage/s/article/K000159034vendor-advisory, patch, mitigation
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.