CVE-2026-107826 OWASP Coraza WAF - Denial of Service

OWASP Coraza WAF 3.0.0 to 3.8.1 contains a denial of service caused by unbounded recursion in readJSON during JSON validation, letting unauthenticated attackers crash the process via deeply nested JSON payloads.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.46% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
9 October 2026
Updated
15 October 2026
Weakness
CWE-674

Vendor fix

Update to version 3.8.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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