Description
Deserialization of untrusted data in the report-processing code of Puppet, as used by Puppet Server, in the affected releases, allows a client that holds any CA-signed agent certificate to execute arbitrary code on the Puppet Server as its service user by submitting a report containing a crafted rich-data type via PUT request. Where the certificate authority autosigns requests without strong verification, an unauthenticated network attacker can obtain such a certificate.
Published: 2026-11-03
Score: 9.4 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

Upgrade to a release that bundles puppet-agent 8.22.2 or 9.1.3 (Puppet Enterprise 2023.8.13, 2025.12.1, or 2026.0.1) and restart puppet server so the fixed code is loaded.

Tracking

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Advisories

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History

Tue, 03 Nov 2026 21:00:00 +0000


Tue, 03 Nov 2026 20:45:00 +0000

Type Values Removed Values Added
Description Deserialization of untrusted data in the report-processing code of Puppet, as used by Puppet Server, in the affected releases, allows a client that holds any CA-signed agent certificate to execute arbitrary code on the Puppet Server as its service user by submitting a report containing a crafted rich-data type via PUT request. Where the certificate authority autosigns requests without strong verification, an unauthenticated network attacker can obtain such a certificate.
Title Report Deserialization Code Execution
Weaknesses CWE-502
CWE-94
References
Metrics cvssV4_0

{'score': 9.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}


Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: Perforce

Published:

Updated: 2026-11-03T20:52:37.394Z

Reserved: 2026-10-23T11:46:21.022Z

Link: CVE-2026-115731

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-03T21:17:01.867

Modified: 2026-11-03T21:17:01.867

Link: CVE-2026-115731

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses