{"api_version":"1","generated_at":"2026-10-09T21:33:01+00:00","cve":"CVE-2026-107833","urls":{"html":"https://cve.report/CVE-2026-107833","api":"https://cve.report/api/cve/CVE-2026-107833.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-107833","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-107833"},"summary":{"title":"OWASP Coraza WAF: Unbounded recursion in JSON response body processor causes CPU exhaustion","description":"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.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-10-09 18:17:04","updated_at":"2026-10-09 18:17:04"},"problem_types":["CWE-674","CWE-674 CWE-674: Uncontrolled Recursion"],"metrics":[{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","score":"5.9","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":5.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"5.9","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://github.com/corazawaf/coraza/commit/cae3c7407e7b84372c207033de03f15f89bf351a","name":"https://github.com/corazawaf/coraza/commit/cae3c7407e7b84372c207033de03f15f89bf351a","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/corazawaf/coraza/releases/tag/v3.8.0","name":"https://github.com/corazawaf/coraza/releases/tag/v3.8.0","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/corazawaf/coraza/security/advisories/GHSA-3c6w-j9xm-8h2h","name":"https://github.com/corazawaf/coraza/security/advisories/GHSA-3c6w-j9xm-8h2h","refsource":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-107833","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107833","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"corazawaf","product":"coraza","version":"affected >= 3.0.0, < 3.8.0","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-107833","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-10-09T18:01:32.504807Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-10-09T18:02:08.775Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"references":[{"tags":["exploit"],"url":"https://github.com/corazawaf/coraza/security/advisories/GHSA-3c6w-j9xm-8h2h"}],"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"coraza","vendor":"corazawaf","versions":[{"status":"affected","version":">= 3.0.0, < 3.8.0"}]}],"descriptions":[{"lang":"en","value":"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."}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-674","description":"CWE-674: Uncontrolled Recursion","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-10-09T17:39:48.049Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/corazawaf/coraza/security/advisories/GHSA-3c6w-j9xm-8h2h","tags":["x_refsource_CONFIRM"],"url":"https://github.com/corazawaf/coraza/security/advisories/GHSA-3c6w-j9xm-8h2h"},{"name":"https://github.com/corazawaf/coraza/commit/cae3c7407e7b84372c207033de03f15f89bf351a","tags":["x_refsource_MISC"],"url":"https://github.com/corazawaf/coraza/commit/cae3c7407e7b84372c207033de03f15f89bf351a"},{"name":"https://github.com/corazawaf/coraza/releases/tag/v3.8.0","tags":["x_refsource_MISC"],"url":"https://github.com/corazawaf/coraza/releases/tag/v3.8.0"}],"source":{"advisory":"GHSA-3c6w-j9xm-8h2h","discovery":"UNKNOWN"},"title":"OWASP Coraza WAF: Unbounded recursion in JSON response body processor causes CPU exhaustion"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-107833","datePublished":"2026-10-09T17:39:48.049Z","dateReserved":"2026-10-08T22:34:49.288Z","dateUpdated":"2026-10-09T18:02:08.775Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-09 18:17:04","lastModifiedDate":"2026-10-09 18:17:04","problem_types":["CWE-674","CWE-674 CWE-674: Uncontrolled Recursion"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":5.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.2,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-09T18:01:32.504807Z","id":"CVE-2026-107833","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"107833","Ordinal":"1","Title":"OWASP Coraza WAF: Unbounded recursion in JSON response body proc","CVE":"CVE-2026-107833","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"107833","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"OWASP Coraza WAF: Unbounded recursion in JSON response body proc"}]}}}