--- title: "CVE-2026-107826: OWASP Coraza WAF - Denial of Service" description: "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." url: https://panop.io/threat-heartbeat/CVE-2026-107826/ --- # 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-107826) ## 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](https://cwe.mitre.org/data/definitions/674.html) ## 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 - [https://nvd.nist.gov/vuln/detail/CVE-2026-107826](https://nvd.nist.gov/vuln/detail/CVE-2026-107826) - [https://github.com/corazawaf/coraza/security/advisories/GHSA-6gcq-wc29-5xf2](https://github.com/corazawaf/coraza/security/advisories/GHSA-6gcq-wc29-5xf2) - [https://github.com/corazawaf/coraza/commit/814e1898e083d2ff2ceb644382d0da17e930f93f](https://github.com/corazawaf/coraza/commit/814e1898e083d2ff2ceb644382d0da17e930f93f) - [https://github.com/corazawaf/coraza/releases/tag/v3.8.1](https://github.com/corazawaf/coraza/releases/tag/v3.8.1) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)