Description
MIME::Parser versions before 5.521 for Perl allow memory exhaustion via indented error messages from a truncated, deeply nested message.
Each stored parser diagnostic is indented by three spaces per nesting level. When a message nested N levels deep ends without its closing boundaries, every level logs an error at its own depth, so the stored diagnostics grow with the square of N. The defaults place no limit on nesting depth.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | MIME-tools | < 5.521 | 5.521 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libmime-tools-perl | 5.522-1 | — |
| Debian 13 | libmime-tools-perl | No fix yet | — |
| Debian 12 | libmime-tools-perl | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libmime-tools-perl | No fix yet | — |
| Ubuntu 26.04 LTS | libmime-tools-perl | No fix yet | — |
| Ubuntu 24.04 LTS | libmime-tools-perl | No fix yet | — |
| Ubuntu 22.04 LTS | libmime-tools-perl | No fix yet | — |
| Ubuntu 20.04 LTS | libmime-tools-perl | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | libmime-tools-perl | No fix yet | — |
| Ubuntu 16.04 LTS | libmime-tools-perl | No fix yet | — |
| Ubuntu 14.04 LTS | libmime-tools-perl | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | perl-MIME-tools | 5.522.0-1.1 | openSUSE-SU-2026:12347-1 |
| openSUSE Leap 16.0 | perl-MIME-tools | 5.522.0-bp160.1.1 | openSUSE-SU-2026:22226-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | perl-MIME-tools | 5.522-1.amzn2023.0.1 | ALAS2023-2026-3425 |
| Amazon Linux 2 | perl-MIME-tools | 5.505-1.amzn2.0.1 | ALAS2-2026-4095 |
Advisories 4
- ALAS2023-2026-3425 Important: perl-MIME-tools security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Nov 12, 2026
- ALAS2-2026-4095 Important: perl-MIME-tools security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Nov 12, 2026
- openSUSE-SU-2026:22226-1 Security update for perl-MIME-tools SUSE / openSUSE Security Updates · Nov 4, 2026
- openSUSE-SU-2026:12347-1 perl-MIME-tools-5.522.0-1.1 on GA media SUSE / openSUSE Security Updates · Oct 31, 2026