CVE-2017-20285

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.34% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 27.2% of scored records. A rank, not a probability.

NVD base score

9.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Deferred. NVD last modified this record on 2026-10-06.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-10-05 06:49Z24 DAYS AGO

Last updated

2026-10-06 17:02Z22 DAYS AGO

Reserved

2026-09-21

Assigning CNA

CPANSec

Record state

PUBLISHED

Severity

Critical (CVSS 9.1)

CNA CVSS vector

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

Weaknesses

• CWE-470Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')Base
• CWE-502Deserialization of Untrusted DataBase

Data version

5.2

Document digest

4da612549ede535740f15fc7b8497631a32daf4b23a7a32d4be8160b66e893d8

• github.comhttps://github.com/ingydotnet/yaml-pm/issues/176issue-tracking
• github.comhttps://github.com/ingydotnet/yaml-pm/commit/471314bbdcbd62077eea32755929122aa8bd00a3.patchpatch
• github.comhttps://github.com/ingydotnet/yaml-pm/commit/7736f38bd02e4f9f77d5468721e3be3d7b34a8ec.patchpatch
• metacpan.orghttps://metacpan.org/release/TINITA/YAML-1.30/changesrelease-notes
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/10/05/8