CVE-2026-41508

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 v3 5.8 MEDIUM

5.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
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

Configurations

No configuration.

History

12 Oct 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-12 21:17

Updated : 2026-10-16 20:04

NVD link : CVE-2026-41508

Mitre link : CVE-2026-41508

CVE.ORG link : CVE-2026-41508

JSON object : View

Products Affected

No product.

CWE

CWE-693

Protection Mechanism Failure

CWE-755

Improper Handling of Exceptional Conditions

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