Esta página ainda não foi traduzida para o seu idioma. Exibindo conteúdo em inglês enquanto trabalhamos nisso.
💡 Keep dependencies up to date — most exploits target known, patchable vulnerabilities.
CVE-2026-41227: DoS in F5 BIG-IP
Plataforma
linux
Componente
bigip
Corrigido em
17.5.1.4
CVE-2026-41227 describes a Denial of Service (DoS) vulnerability affecting F5 BIG-IP systems. Exploitation involves sending specially crafted HTTP/2 traffic to an HTTP/2 virtual server with Layer 7 DoS Protection enabled, leading to increased memory consumption and potential termination of the Traffic Management Microkernel (TMM) process. This can result in service outages. The vulnerability impacts versions 16.1.0 through 17.5.1.4, and a fix is available in version 17.5.1.4.
Impacto e Cenários de Ataquetraduzindo…
Successful exploitation of CVE-2026-41227 can lead to a complete denial of service for applications and services relying on the affected F5 BIG-IP instance. The TMM process termination effectively halts traffic processing, rendering the virtual server unavailable. The impact can range from temporary service interruptions to prolonged outages, depending on the criticality of the affected applications. While the vulnerability requires specific HTTP/2 traffic manipulation, the relative ease of crafting such payloads, combined with the potential for widespread disruption, makes it a significant concern. Organizations heavily reliant on F5 BIG-IP for load balancing and application delivery are particularly vulnerable.
Contexto de Exploraçãotraduzindo…
CVE-2026-41227 was published on May 13, 2026. The vulnerability's severity is rated HIGH (CVSS 7.5). Currently, there are no publicly available exploits or active campaigns targeting this vulnerability. It is not listed on KEV (Known Exploited Vulnerabilities) as of the publication date. The EPSS (Exploit Prediction Score System) score is pending evaluation, but the potential for DoS impact suggests a medium to high probability of exploitation if a suitable exploit is developed and released.
Inteligência de Ameaças
Status do Exploit
CISA SSVC
Vetor CVSS
O que significam essas métricas?
- Attack Vector
- Rede — explorável remotamente pela internet. Sem acesso físico ou local necessário.
- Attack Complexity
- Baixa — sem condições especiais. O atacante pode explorar de forma confiável.
- Privileges Required
- Nenhum — sem autenticação necessária para explorar.
- User Interaction
- Nenhuma — ataque automático e silencioso. A vítima não faz nada.
- Scope
- Inalterado — impacto limitado ao componente vulnerável.
- Confidentiality
- Nenhum — sem impacto na confidencialidade.
- Integrity
- Nenhum — sem impacto na integridade.
- Availability
- Alto — falha completa ou esgotamento de recursos. Negação de serviço total.
Software Afetado
Classificação de Fraqueza (CWE)
Linha do tempo
- Reservado
- Publicada
Mitigação e Soluções Alternativastraduzindo…
The primary mitigation for CVE-2026-41227 is to upgrade F5 BIG-IP to version 17.5.1.4 or later, which contains the fix. If immediate upgrade is not feasible, implement temporary workarounds. Configure a Web Application Firewall (WAF) or proxy to filter out potentially malicious HTTP/2 requests. Specifically, look for unusual header patterns or request sizes that deviate from expected traffic. Consider implementing rate limiting on HTTP/2 connections to reduce the impact of a potential attack. Monitor TMM process resource utilization closely; spikes in memory consumption could indicate exploitation attempts. After upgrading, confirm the fix by sending test HTTP/2 requests and verifying that TMM resource usage remains stable.
Como corrigirtraduzindo…
Aplique las actualizaciones de seguridad proporcionadas por F5 para BIG-IP. Consulte la nota de seguridad K000158979 en el sitio web de F5 para obtener más detalles sobre las versiones afectadas y las actualizaciones disponibles.
Perguntas frequentestraduzindo…
What is CVE-2026-41227 — DoS in F5 BIG-IP?
CVE-2026-41227 is a high-severity Denial of Service vulnerability in F5 BIG-IP affecting versions 16.1.0–17.5.1.4. Malformed HTTP/2 traffic can cause service disruption by terminating the TMM process.
Am I affected by CVE-2026-41227 in F5 BIG-IP?
You are affected if you are running F5 BIG-IP versions 16.1.0 through 17.5.1.4 and have HTTP/2 virtual servers with Layer 7 DoS Protection enabled. Check your version immediately.
How do I fix CVE-2026-41227 in F5 BIG-IP?
Upgrade to F5 BIG-IP version 17.5.1.4 or later. As a temporary workaround, configure WAF rules to filter malicious HTTP/2 requests.
Is CVE-2026-41227 being actively exploited?
As of the publication date, there are no publicly known exploits or active campaigns targeting CVE-2026-41227, but the potential for exploitation exists.
Where can I find the official F5 advisory for CVE-2026-41227?
Refer to the official F5 Security Advisory for CVE-2026-41227 on the F5 website (link will be available upon publication).
Seu projeto está afetado?
Envie seu arquivo de dependências e descubra na hora se esta e outras CVEs te atingem.
Experimente agora — sem conta
Faça upload de qualquer manifesto (composer.lock, package-lock.json, lista de plugins WordPress…) ou cole sua lista de componentes. Receba um relatório de vulnerabilidades instantaneamente. Fazer upload de um arquivo é só o começo: com uma conta, você obtém monitoramento contínuo, alertas por Slack/email, relatórios multiprojeto e white-label.
Arraste e solte seu arquivo de dependências
composer.lock, package-lock.json, requirements.txt, Gemfile.lock, pubspec.lock, Dockerfile...