Resource exhaustion in Corazawaf Coraza
CVE-2026-107834
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.
Vulnerability class: DoS (Denial of Service)
Published .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Corazawaf Coraza — versions >= 3.0.0, < 3.8.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-107834?
- CVE-2026-107834 is a medium-severity vulnerability in Corazawaf Coraza, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2026-10-09.
- How severe is CVE-2026-107834?
- Medium severity. CVSS v3 base score is 5.3 out of 10.