Disclosure summary
OWASP Coraza WAF is a golang modsecurity compatible web application firewall library. From 3.0.0 until 3.8.0, ProcessResponse in internal/bodyprocessors/json.go passes the ignoreJSONRecursionLimit value of -1 to readJSON, while the recursive guard only stops at zero. A network attacker who can cause an application protected by Coraza to return deeply nested JSON can make response-body processing perform quadratic work, consuming one CPU core for seconds per response within the default ResponseBodyLimit. Request JSON processing is not affected by this specific path because it uses the configured request recursion limit, and exploitation requires response-body inspection to be enabled. This issue is fixed in version 3.8.0.
Source-reported weakness categories
CWE-674
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2026-107833
Open original source · Updated Oct 09, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
GitHub Reviewed Security Advisories · GHSA-3c6w-j9xm-8h2h
Open original source · Updated Oct 09, 2026
Coraza: Unbounded recursion in JSON response body processor causes CPU exhaustion
Source severity: MEDIUM / 0
| Ecosystem | Package | Affected range | First patched |
|---|---|---|---|
| go | github.com/corazawaf/coraza/v3 | >= 3.0.0, < 3.8.0 | 3.8.0 |
Original records & references
PUBLISHED 2026-10-09T14:17:04-04:00
MODIFIED 2026-10-09T14:17:04-04:00
INGESTED 2026-10-10T20:55:12-04:00