← Vulnerability feed

Vulnerability record · CVE-2026-41227 · published 13 May 2026

CVE-2026-41227: F5 big-ip advanced web application firewall allocation without limits vulnerability

F5 · Big Ip Advanced Web Application Firewall

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.

8.7 CVSS 4.0 High EPSS 0.46% · top 62.6% CWE-770 · Allocation without limits
8.7CVSS 4.0 base score
0.46%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
1References
24 Jun 2026Last modified by NVD

Description

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.

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:

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://my.f5.com/manage/s/article/K000158979 Vendor Advisory

Track CVE-2026-41227 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-46747F5 BIG-IP configuration utility authentication bypass allows command executionUndisclosed requests can bypass authentication in the BIG-IP configuration utility, letting a network-positioned attacker execute arbitrary system co…KEVEPSS 97%analysed9.8CVE-2022-1388F5 BIG-IP iControl REST authentication bypassUndisclosed requests to the iControl REST interface on multiple F5 BIG-IP modules can bypass authentication, allowing an unauthenticated remote attac…KEVEPSS 100%analysed9.8CVE-2021-22991F5 BIG-IP TMM URI normalization buffer overflowF5 BIG-IP's Traffic Management Microkernel (TMM) mishandles URI normalization for undisclosed requests to a virtual server, triggering a buffer overf…KEVEPSS 61%analysed9.8CVE-2021-22986F5 BIG-IP iControl REST unauthenticated remote command executionThe iControl REST interface on multiple F5 BIG-IP and BIG-IQ versions exposes an unauthenticated remote command execution flaw, tracked as CWE-918 se…KEVEPSS 100%analysed9.8CVE-2020-5902F5 BIG-IP TMUI path traversal leading to remote code executionThe F5 BIG-IP Traffic Management User Interface (TMUI, also called the Configuration utility) contains a path traversal flaw (CWE-22) in undisclosed …KEVEPSS 100%analysed9.8CVE-2014-7169GNU Bash environment variable function parsing command injection (Shellshock variant)GNU Bash through 4.3 bash43-025 processes trailing strings after malformed function definitions in environment variable values, allowing command inje…KEVEPSS 100%analysed9.8CVE-2014-6271GNU Bash environment variable command injection (ShellShock)GNU Bash through 4.3 processes trailing strings after function definitions in environment variable values, allowing injected commands to run when Bas…KEVEPSS 100%analysed8.8CVE-2023-46748F5 BIG-IP Configuration Utility SQL injection leads to command executionAn authenticated SQL injection flaw exists in the BIG-IP Configuration utility. An attacker who already holds valid credentials and can reach the man…KEVEPSS 4.5%analysed

Source: NIST National Vulnerability Database (record CVE-2026-41227), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.