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CVE-2026-116267unknown

MIME::Parser versions before 5.521 for Perl allow memory exhaustion via indented error messages from a truncated, deeply nested message

Impact

MIME::Parser versions before 5.521 for Perl may allow memory exhaustion via indented error messages from a truncated, deeply nested message. The vulnerability is due to inefficient algorithmic complexity. An attacker would need to send a specially crafted message.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

What to do

Upgrade to MIME-tools 5.521 or later.

CPANSec guidance

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Vendor not supplied · CPANSec

MIME-tools

1 range
CPANSec version evidence

Package identity

pkg:cpan/MIME-tools

Identity supplied by CPANSec. Version matching requires compatible range evidence.

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 5.521

custom versions

unaffected

unknown

Other versions: unaffected

Original source 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.

Inside the record

Evidence available

Package identity
Version evidence
Remediation guidance
Weakness classification
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-116267

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-407 ↗

CWE-407 Inefficient Algorithmic Complexity

CPANSec

Related →
Contributing organizations · 1
CPANSec

Assigning organization

2026-10-28

What changed

Follow changes
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Large field values are marked as truncated previews. Original source snapshots remain retained.

References

1 sources
metacpan.org/release/DSKOLL/MIME-tools-5.521/changes
release-notesCPANSec