{"id":"CVE-2026-107826","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-107826","generatedAt":"2026-10-27T23:51:33.814Z","title":"An unauthenticated attacker can submit shallow values followed by an extremely deeply nested JSON tail that was not visited by the bounded walk, causing gjson.Valid to recurse without a depth bound and terminate the hosting process with an unrecoverable…","description":"OWASP Coraza WAF is a golang modsecurity compatible web application firewall library. From 3.0.0 until 3.8.1, readJSON in internal/bodyprocessors/json.go can stop its bounded flattening walk after reaching SecArgumentsLimit or the byte budget and then call gjson.Valid on the complete raw body. An unauthenticated attacker can submit shallow values followed by an extremely deeply nested JSON tail that was not visited by the bounded walk, causing gjson.Valid to recurse without a depth bound and terminate the hosting process with an unrecoverable fatal stack overflow. The ProcessRequest and ProcessResponse JSON paths share the affected readJSON validation flow, and the payload can remain within recommended body-size and argument-count limits. This issue is fixed in version 3.8.1.","published":"2026-10-09T18:17:05.000Z","lastModified":"2026-10-16T17:16:41.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-674"],"affected":[],"epss":{"score":0.00461,"percentile":0.39703,"date":"2026-10-26","history":[{"date":"2026-10-10","score":0.00461,"percentile":0.38051}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-09T18:17:05.000Z","detail":{"score":"7.5","severity":"HIGH","publishedAt":"2026-10-09T18:17:04.673Z"},"summary":"New CVE, high severity (CVSS 7.5)."}],"references":[{"url":"https://github.com/corazawaf/coraza/commit/814e1898e083d2ff2ceb644382d0da17e930f93f","source":"security-advisories@github.com"},{"url":"https://github.com/corazawaf/coraza/releases/tag/v3.8.1","source":"security-advisories@github.com"},{"url":"https://github.com/corazawaf/coraza/security/advisories/GHSA-6gcq-wc29-5xf2","source":"security-advisories@github.com"},{"url":"https://github.com/corazawaf/coraza/security/advisories/GHSA-6gcq-wc29-5xf2","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-107826","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}