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[ CVE-2026-107834 · Published 9 Oct 2026 ]

Coraza: Resource exhaustion via deferred file handle accumulation in multipart body processor

CVSS 5.3 EPSS <1%Fix available

[ Description ]Official description

OWASP Coraza WAF is a golang modsecurity compatible web application firewall library. From 3.0.0 until 3.8.0, the multipart loop in internal/bodyprocessors/multipart.go executes defer temp.Close() for every uploaded file part, so each temporary-file descriptor remains open until the complete request returns. An unauthenticated attacker can submit a multipart body containing many minimal file parts and exhaust the process file-descriptor table within the request-body size limit, causing os.CreateTemp failures, MULTIPART_STRICT_ERROR responses, blocked legitimate uploads, and process-wide inability to open files or sockets. This issue is fixed in version 3.8.0.

[ Fixes ]Fixes and patches

[ Packages ]Affected open-source packages

  • github.com/corazawaf/coraza/v3 goAffected >= 3.0.0, < 3.8.0 · fixed in 3.8.0 · GHSA-rp9v-7xv3-r6g3

[ References ]References