{"cve":"CVE-2026-41508","nvd":{"published":"2026-10-12T21:17:17.240","modified":"2026-10-16T20:04:29.760","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","score":5.8},"cwes":["CWE-693","CWE-755"],"references":["https://github.com/corazawaf/coraza/commit/f94c81bec209f658120c418448d0590a549b71df","https://github.com/corazawaf/coraza/releases/tag/v3.8.0","https://github.com/corazawaf/coraza/security/advisories/GHSA-r3rm-qphw-hh76"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:58:52.678897993+00:00"},"epss":{"cve":"CVE-2026-41508","score":0.00497,"percentile":0.42292,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-r3rm-qphw-hh76","url":"https://osv.dev/vulnerability/GHSA-r3rm-qphw-hh76","summary":"Coraza: Truncated multipart body bypasses MULTIPART_STRICT_ERROR (rule 200003) via silent io.ErrUnexpectedEOF handling","modified":"2026-10-20T00:56:07.669628811Z","packages":[{"ecosystem":"Go","name":"github.com/corazawaf/coraza/v3","purl":"pkg:golang/github.com/corazawaf/coraza/v3","ranges":[">=3.4.0 <3.8.0"],"fixed":["3.8.0"]}]},{"id":"GO-2026-6670","url":"https://osv.dev/vulnerability/GO-2026-6670","summary":"Coraza: Truncated multipart body bypasses MULTIPART_STRICT_ERROR (rule 200003) via silent io.ErrUnexpectedEOF handling in github.com/corazawaf/coraza","modified":"2026-10-20T00:45:10.100527236Z","packages":[{"ecosystem":"Go","name":"github.com/corazawaf/coraza","purl":"pkg:golang/github.com/corazawaf/coraza","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/corazawaf/coraza/v2","purl":"pkg:golang/github.com/corazawaf/coraza/v2","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/corazawaf/coraza/v3","purl":"pkg:golang/github.com/corazawaf/coraza/v3","ranges":[">=3.4.0 <3.8.0"],"fixed":["3.8.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}