CLEANSTART-2026-ES44581: In Apache CXF, the parser for multipart/MTOM attachment part headers did not fully enforce the configured attachment-max-header-size (default 300 characters) and attachment-headers-max-count (defau...

Q: What configurations are exposed to this issue?

The affected multipart/MTOM attachment header parser has default limits of 300 characters per attachment header and 500 attachment headers, but did not fully enforce those configured limits. The data identifies the affected software as cleanstart/wso2am.

Q: What could an unauthenticated attacker do?

The CVSS vector indicates network-based exploitation with low attack complexity, no privileges, and no user interaction. The reported impact is limited to availability, with no stated confidentiality or integrity impact.

Published Nov 11, 2026

Updated

Security vulnerability affects the wso2am package. In Apache CXF, the parser for multipart/MTOM attachment part headers did not fully enforce the configured attachment-max-header-size (default 300 characters) and attachment-headers-max-count (default 500) limits.

Affected Software

1 affected componentFixes available

cleanstart/wso2am<4.7.0-r5

4.7.0-r5

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade cleanstart/wso2am to a version that resolves this vulnerability.
Fixed in 4.7.0-r5

Event History

Nov 11, 2026

Advisory Published

via OSV·12:37 AM

Data Sourced

via OSV·12:37 AM

DescriptionSeverityAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

CVE-2026-107937

Frequently Asked Questions

What configurations are exposed to this issue?

The affected multipart/MTOM attachment header parser has default limits of 300 characters per attachment header and 500 attachment headers, but did not fully enforce those configured limits. The data identifies the affected software as cleanstart/wso2am.

What could an unauthenticated attacker do?

The CVSS vector indicates network-based exploitation with low attack complexity, no privileges, and no user interaction. The reported impact is limited to availability, with no stated confidentiality or integrity impact.

CLEANSTART-2026-ES44581: In Apache CXF, the parser for multipart/MTOM attachment part headers did not fully enforce the configured attachment-max-header-size (default 300 characters) and attachment-headers-max-count (defau...

Affected Software

Remediation

Event History

Child vulnerabilities

Frequently Asked Questions

What configurations are exposed to this issue?

What could an unauthenticated attacker do?

Company

Resources

Contact

Frequently Asked Questions

What configurations are exposed to this issue?

What could an unauthenticated attacker do?