CVE-2026-41508

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-41508
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-41508.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-41508
Aliases
Published
2026-10-12T20:01:09Z
Modified
2026-10-20T00:55:54Z
Severity
  • 5.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N CVSS Calculator
Summary
OWASP Coraza WAF: Truncated multipart body bypasses MULTIPART_STRICT_ERROR (rule 200003) via silent io.ErrUnexpectedEOF handling
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-693",
        "CWE-755"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41508.json"
}
References

Affected packages

Git / github.com/corazawaf/coraza

Affected ranges

Type
GIT
Repo
https://github.com/corazawaf/coraza
Events
Introduced
9b1d1e944e147e8f0cb92877864f71b27b9c6a7d
Fixed
19b86824f5e97eba72b289a81d5b3c1260292ff0
Fixed
f94c81bec209f658120c418448d0590a549b71df
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "3.4.0"
                },
                {
                    "fixed":  "3.8.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "f94c81bec209f658120c418448d0590a549b71df"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v3.8.0",
            "range":  [
                {
                    "fixed":  "19b86824f5e97eba72b289a81d5b3c1260292ff0"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

v3.*
v3.4.0
v3.5.0
v3.6.0
v3.7.0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-41508.json"