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Vulnerability record · CVE-2017-2295 · published 5 July 2017

CVE-2017-2295: Puppet deserialization of untrusted data vulnerability

Puppet · Puppet

Versions of Puppet prior to 4.10.1 will deserialize data off the wire (from the agent to the server, in this case) with a attacker-specified format. This could be used to force YAML deserialization in an unsafe manner, which would lead to remote code execution. This change constrains the format of data on the wire to PSON or safely decoded YAML.

8.2 CVSS 3.0 High EPSS 2.4% · top 16.8% CWE-502 · Deserialization of untrusted data
8.2CVSS 3.0 base score, v2 6.0
2.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

Versions of Puppet prior to 4.10.1 will deserialize data off the wire (from the agent to the server, in this case) with a attacker-specified format. This could be used to force YAML deserialization in an unsafe manner, which would lead to remote code execution. This change constrains the format of data on the wire to PSON or safely decoded YAML.

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.debian.org/security/2017/dsa-3862 Third Party Advisory
http://www.securityfocus.com/bid/98582 Third Party AdvisoryVDB Entry
https://puppet.com/security/cve/cve-2017-2295 Vendor Advisory
http://www.debian.org/security/2017/dsa-3862 Third Party Advisory
http://www.securityfocus.com/bid/98582 Third Party AdvisoryVDB Entry
https://puppet.com/security/cve/cve-2017-2295 Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2017-2295), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.