{"id":"CVE-2026-41508","sourceIdentifier":"security-advisories@github.com","published":"2026-10-12T21:17:17.240","lastModified":"2026-10-16T20:04:29.760","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"OWASP Coraza WAF is a golang modsecurity compatible web application firewall library. From 3.4.0 until 3.8.0, the multipart processor in internal/bodyprocessors/multipart.go treats io.ErrUnexpectedEOF as nonfatal without setting MULTIPART_STRICT_ERROR. A remote attacker can submit a truncated multipart body that produces io.ErrUnexpectedEOF, causing parsing to stop without raising the strict-error signal used by the recommended defensive rule. Rules 200002 and 200003 do not fire, allowing multipart parser-disagreement payloads to reach a backend that interprets the truncated body differently. This issue is fixed in version 3.8.0."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"corazawaf","product":"coraza","versions":[{"version":">= 3.4.0, < 3.8.0","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","baseScore":5.8,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-13T20:19:07.186164Z","id":"CVE-2026-41508","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-693"},{"lang":"en","value":"CWE-755"}]}],"references":[{"url":"https://github.com/corazawaf/coraza/commit/f94c81bec209f658120c418448d0590a549b71df","source":"security-advisories@github.com"},{"url":"https://github.com/corazawaf/coraza/releases/tag/v3.8.0","source":"security-advisories@github.com"},{"url":"https://github.com/corazawaf/coraza/security/advisories/GHSA-r3rm-qphw-hh76","source":"security-advisories@github.com"}]}