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TI-2026-29836 Aliases CVE-2026-41227GHSA-mggm-3mvj-fj65

BIG-IP HTTP/2 Layer 7 Dos Protection vulnerability

Priority MEDIUM 43CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

On an HTTP/2 virtual server with Layer 7 DoS Protection configured, undisclosed traffic can result in an increase in memory consumption causing the Traffic Management Microkernel (TMM) process to terminate.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00263 18th percentileScored 2026-11-07
Fix Fixed BIG-IP (F5): 21.0.0, 17.5.1.4, 17.1.3.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
F5BIG-IP17.5.0 to before 17.5.1.4; 17.1.0 to before 17.1.3.1; 16.1.0 and later21.0.0, 17.5.1.4, 17.1.3.1Patch availableCNA
  • BIG-IP VendorF5 Affected 17.5.0 to before 17.5.1.4; 17.1.0 to before 17.1.3.1; 16.1.0 and later Fixed in 21.0.0, 17.5.1.4, 17.1.3.1 Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*17.1.0 – 17.1.3; 17.5.0 – 17.5.1VulnerableF5
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*17.1.0 – 17.1.3; 17.5.0 – 17.5.1VulnerableF5
cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:*17.1.0 – 17.1.3; 17.5.0 – 17.5.1VulnerableF5
cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*16.1.0 – 16.1.6VulnerableF5
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*16.1.0 – 16.1.6VulnerableF5
cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:*16.1.0 – 16.1.6VulnerableF5
  • cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:* Versions 17.1.0 – 17.1.3; 17.5.0 – 17.5.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* Versions 17.1.0 – 17.1.3; 17.5.0 – 17.5.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:* Versions 17.1.0 – 17.1.3; 17.5.0 – 17.5.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:* Versions 16.1.0 – 16.1.6 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* Versions 16.1.0 – 16.1.6 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:* Versions 16.1.0 – 16.1.6 Vulnerable ·F5

Remediation

  • Fix · CNA BIG-IP (F5) Fixed in 21.0.0, 17.5.1.4, 17.1.3.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    F5 BIG-IP 17.1.3.1, 17.5.1.4

    9 records Highest priority Priority MEDIUM 4 MEDIUM, 5 LOW

    Other records, highest priority first

    • TI-2026-29357 BIG-IP SSL/TLS vulnerabilityPriority MEDIUM 44
    • TI-2026-30351 BIG-IP TMM VulnerabilityPriority MEDIUM 43
    • TI-2026-30352 BIG-IP and BIG-IQ Configuration utility vulnerabilityPriority MEDIUM 40
    Show all 9 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-41227
  2. 2026-10-03 Alias added: GHSA-mggm-3mvj-fj65

References

Patch 1

  • TI-2023-25230 BIG-IP Configuration utility unauthenticated remote code execution vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-05850 Memory corruption in BIG-IP KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-05845 Server-side request forgery in BIG-IP; BIG-IQ KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-04820 Path traversal in BIG-IP KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-25231 BIG-IP Configuration utility authenticated SQL injection vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
See all 194 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences