HIGHCVE-2026-42409Published Modified CNA f5
CVE-2026-42409: BIG-IP HTTP/2 vulnerability
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.
Metrics
- CVSS v4.0
- 8.7
- Severity
- HIGH
- Fixed in
- *
- Affected Products
- 4
Affected packages
- F5 / BIG-IP< 21.0.0.1 (from 21.0.0) · < 17.5.1.4 (from 17.5.0) · < 17.1.3.1 (from 17.1.0) · < * (from 16.1.0)Fixed in 21.1.0
- F5 / BIG-IP Next SPK< 2.0.3 (from 2.0.0) · < 1.7.17 (from 1.7.0)
- F5 / BIG-IP Next CNF< 2.0.3 (from 2.0.0) · < 1.4.1 (from 1.4.0)
- F5 / BIG-IP Next for Kubernetes< 2.1.1 (from 2.0.0)
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NReferences