CVE-2017-20285 YAML Perl - Insecure Deserialization

YAML for Perl < 1.30 contains an insecure deserialization vulnerability caused by loading documents that trigger DESTROY methods of arbitrary classes, letting attackers execute arbitrary code, exploit requires crafted YAML input.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.32% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Insecure Deserialization
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
5 October 2026
Updated
15 October 2026
Weakness
CWE-470

Vendor fix

Update to version 1.30 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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