CVE-2026-44294: DoS in protobufjs ≤7.5.5
Plataforma
nodejs
Componente
protobufjs
CVE-2026-44294 describes a Denial of Service (DoS) vulnerability affecting protobufjs versions 7.5.5 and earlier. An attacker can exploit this by providing a malicious protobuf schema or JSON descriptor, leading to runtime code generation errors and rendering affected message types unusable. The vulnerability was published on May 12, 2026, and mitigation strategies focus on schema validation and upgrading to a patched version.
Impacto e Cenários de Ataquetraduzindo…
The primary impact of CVE-2026-44294 is a denial of service. Successful exploitation prevents the use of specific protobuf message types within applications utilizing protobufjs. This can disrupt critical functionality relying on these message formats, potentially leading to application crashes or service unavailability. The attack vector involves injecting malicious control characters into protobuf field names, which are then embedded into generated JavaScript code. This triggers syntax errors during runtime code generation, effectively disabling the message type. While the vulnerability doesn't directly expose sensitive data, the disruption of service can have significant operational consequences.
Contexto de Exploraçãotraduzindo…
CVE-2026-44294 is currently not listed on KEV or EPSS. The CVSS score is 5.3 (Medium), indicating a moderate probability of exploitation. No public Proof-of-Concept (PoC) code has been publicly released as of the publication date. Active campaigns targeting this vulnerability are not currently known, but the ease of schema manipulation suggests potential for future exploitation.
Inteligência de Ameaças
Status do Exploit
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
- Baixo — negação de serviço parcial ou intermitente.
Software Afetado
Classificação de Fraqueza (CWE)
Linha do tempo
- Publicada
Mitigação e Soluções Alternativastraduzindo…
The recommended mitigation for CVE-2026-44294 is to upgrade to a patched version of protobufjs. Unfortunately, a fixed version is not yet available. As a workaround, implement strict input validation on any protobuf schemas or JSON descriptors received from untrusted sources. This validation should specifically filter out or escape control characters that could be exploited. Consider using a Web Application Firewall (WAF) to inspect and block malicious protobuf payloads. Thoroughly review and sanitize any external data used to construct protobuf messages.
Como corrigirtraduzindo…
Nenhum patch oficial disponível. Procure alternativas ou monitore atualizações.
Perguntas frequentestraduzindo…
What is CVE-2026-44294 — DoS in protobufjs ≤7.5.5?
CVE-2026-44294 is a Denial of Service vulnerability in protobufjs versions up to 7.5.5. A malicious protobuf schema can cause runtime code generation to fail, rendering message types unusable.
Am I affected by CVE-2026-44294 in protobufjs?
If you are using protobufjs version 7.5.5 or earlier and process protobuf schemas from untrusted sources, you are potentially affected by this vulnerability.
How do I fix CVE-2026-44294 in protobufjs?
A patched version is not yet available. Implement strict input validation on protobuf schemas and consider using a WAF to block malicious payloads.
Is CVE-2026-44294 being actively exploited?
As of the publication date, there are no known active campaigns exploiting CVE-2026-44294, but the vulnerability's nature suggests potential for future exploitation.
Where can I find the official protobufjs advisory for CVE-2026-44294?
Refer to the protobufjs project's official website and GitHub repository for updates and advisories related to CVE-2026-44294.
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