MIME::Field::ParamVal versions before 5.521 for Perl do not flag a duplicate boundary parameter whose name contains a nested comment.
A parameter written boundary((c))="A" or boundary(\))="A" is stored under that literal name rather than as boundary. A second boundary parameter is then not reported as a duplicate, and MIME::Parser splits the message on it.
Readers that skip comments as RFC 5322 allows take the first boundary instead. A remote sender can hide an attachment from a filter that relies on ambiguous_content() while the recipient's mail client shows it.
CVSS
No CVSS.
References
Configurations
No configuration.
History
28 Oct 2026, 18:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-10-28 18:17
Updated : 2026-10-29 15:11
NVD link : CVE-2026-116272
Mitre link : CVE-2026-116272
CVE.ORG link : CVE-2026-116272
JSON object : View
Products Affected
No product.
CWE
CWE-436
Interpretation Conflict
