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CVE-2026-116273                                      CPAN Security Group
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         CVE ID:  CVE-2026-116273

   Distribution:  MIME-tools
       Versions:  before 5.521
       MetaCPAN:  https://metacpan.org/dist/MIME-tools
       VCS Repo:  https://salsa.debian.org/dskoll/mime-tools

MIME::Parser versions before 5.521 for Perl set no limit on the number
of message parts by default, allowing memory exhaustion

Description
-----------
MIME::Parser versions before 5.521 for Perl set no limit on the number
of message parts by default, allowing memory exhaustion.

The max_parts option defaulted to -1, which disables the limit, so a
parser created with default settings builds an entity for every part
however many a message has.

Version 5.521 sets max_parts to 1000 and max_depth to 64 by default.
Setting either to -1 still removes the limit.

Problem types
-------------
- CWE-1188 Initialization of a Resource with an Insecure Default
- CWE-770 Allocation of Resources Without Limits or Throttling

Solutions
---------
Upgrade to MIME-tools 5.521 or later.

References
----------
https://metacpan.org/release/DSKOLL/MIME-tools-5.521/changes