SB2026051430 - Remote denial of service in F5 BIG-IP products
Published: May 14, 2026
Security Bulletin ID
SB2026051430
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-40629)
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in a virtual server configured with a client SSL profile when processing undisclosed traffic. A remote attacker can send undisclosed traffic to cause a denial of service.
Only new client connections to the impacted virtual server are disrupted. There is no control plane exposure; this is a data plane issue only.
Remediation
Install update from vendor's website.