All vulnerabilities
CVE-2026-114099GHSA-5gj4-9gm7-2fx2GO-2026-6692

Coraza 3.0.0 before 3.8.1 WAF Bypass via JSON Key Collision

corazawaf corazaGoLibraries & packages
Open in ThreatlineRecord JSON
CVSS
6.9Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.20%Chance of exploitation activity in the next 30 days, higher than 9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in3.8.1Fixed versionCVE List
Published21 Oct 2026Updated 21 Oct 2026CVE List

What fixes it

  • 3.8.1corazaCVE List
  • 3.8.1github.com/corazawaf/coraza/v3, GoOSVgo get github.com/corazawaf/coraza/v3@v3.8.1

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

Coraza from 3.0.0 before 3.8.1 has a JSON body processor that flattens nested properties into dot-separated ARGS_POST names without escaping literal dots, so distinct properties collide. Unauthenticated attackers can add a later dotted property such as account.role that overwrites a malicious nested value, hiding SQL injection payloads from OWASP CRS rules while backends still receive them.

Text from CVE List

Affected versions 3

  • corazaaffected: 3.0.0 before 3.8.1CVE List
  • corazaunaffected: 3.8.1CVE List
  • github.com/corazawaf/coraza/v3, Gofrom 3.0.0, fixed in 3.8.1OSV

References 2