CVE-2017-20285

CriticalCVSS 9.1/10Last modified Oct 6, 2026

Description

YAML versions before 1.30 for Perl allow a loaded document to trigger the DESTROY method of arbitrary classes.

A perl/hash:Class tag blesses a hash into the class it names. The document supplies the object's fields, and Perl calls DESTROY when it goes out of scope.

What DESTROY does depends on the classes the process has loaded. With File::Temp::Dir from core Perl, it can delete a directory tree the document names.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-470CWE-502

Affected software

No affected versions have been published.

Timeline

Published
Oct 5, 2026
Last modified
Oct 6, 2026
NVD status
Deferred

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CVE-2017-20285: Critical severity, CVSS 9.1 | Vulnix