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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-116273
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-28 18:17:13 UTC
Updated2026-10-29 15:11:53 UTC
DescriptionMIME::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.

Risk And Classification

EPSS: 0.001770000 probability, percentile 0.072550000 (date 2026-10-29)

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

References

ReferenceSourceLinkTags
metacpan.org/release/DSKOLL/MIME-tools-5.521/changes 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: Upgrade to MIME-tools 5.521 or later.

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