Falhas do tipo CWE-367

680 resultados

Condição de corrida entre verificação e uso (TOCTOU)

A aplicação verifica uma condição (ex: arquivo existe, usuário tem permissão) e depois atua sobre ela, mas entre a verificação e a ação outro processo pode alterar o estado. Um atacante explora esse intervalo para burlar controles de segurança ou acessar recursos que não deveria.

Exemplo

Um programa verifica se um arquivo é seguro para ler (if (arquivo_existe && nao_eh_symlink)), depois abre e processa. Um atacante substitui o arquivo por um symlink apontando para /etc/passwd entre a verificação e a leitura, conseguindo acessar dados sensíveis.

Como mitigar

Use operações atômicas do SO (open com flags O_NOFOLLOW, O_EXCL; fstat em vez de stat; operações que verificam e atuam em uma única chamada). Implemente locks/mutexes se lógica complexa for necessária, e valide o estado novamente após adquirir recurso.

CVE-2026-34354HIGHAkamai Guardicore Platform Agent (GPA) and Zero Trust Client on Linux and macOS allow TOCTOU-based local privilege escalation. The GPA serviEPSS 0.3%CVE-2024-2913MEDIUMRace Condition Vulnerability in mintplex-labs/anything-llmEPSS 0.3%CVE-2026-66314MEDIUMMicrosoft Edge (Chromium-based) Information Disclosure VulnerabilityEPSS 0.3%CVE-2025-71216HIGHA time-of-check time-of-use vulnerability in the Trend Micro Apex One (mac) agent cache mechanism could allow a local attacker to escalate pEPSS 0.3%CVE-2026-24065HIGHLocal Privilege Escalation via Insecure XPC Client Validation in Waves Central for macOSEPSS 0.3%CVE-2025-46336MEDIUMRack session gets restored after deletionEPSS 0.3%CVE-2024-51563MEDIUMbhyve(8) virtio_vq_recordon time-of-check to time-of-use raceEPSS 0.3%CVE-2025-53134HIGHWindows Ancillary Function Driver for WinSock Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-77972CRITICALsafeurl validated address is not bound to the request, allowing DNS rebindingEPSS 0.3%CVE-2025-21191HIGHWindows Local Security Authority (LSA) Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-78991MEDIUMRace condition in WebProtect in Google Chrome prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process to oEPSS 0.3%CVE-2026-34224LOWParse Server: MFA single-use token bypass via concurrent authData login requestsEPSS 0.3%CVE-2025-64180CRITICALManager-io/Manager: Complete Bypass of SSRF Protection via Time-of-Check Time-of-Use (TOCTOU)EPSS 0.3%CVE-2026-25052CRITICALn8n Improper File Access Controls Allow Arbitrary File Read by Authenticated UsersEPSS 0.3%CVE-2026-1035LOWOrg.keycloak.protocol.oidc: keycloak refresh token reuse bypass via toctou race conditionEPSS 0.3%CVE-2026-79263HIGHRace condition in Extensions in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to execute arbitrary code inside the sandbox EPSS 0.3%CVE-2025-62004HIGHBullWall Server Intrusion Protection (SIP) initialization race conditionEPSS 0.3%CVE-2026-20831HIGHWindows Ancillary Function Driver for WinSock Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2022-1537HIGHfile.copy operations in GruntJS are vulnerable to a TOCTOU race condition leading to arbitrary file write in gruntjs/gruntEPSS 0.3%CVE-2026-76020HIGHRace condition in V8 in Google Chrome prior to 151.0.7922.173 allowed a remote attacker to execute arbitrary code inside the sandbox via a cEPSS 0.3%