CVE-2026-115731: Report Deserialization Code Execution

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of 10 Nov 2026.

VulnCheck KEV lists it since 4 Nov 2026. It cites 1 public report, the first from 4 Nov 2026.

• reddit.com

How likely is exploitation in the next 30 days?

0.4%

EPSS score, percentile 30.8 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?

9.4 Critical

CVSS v4.0 base score, given by the CNA

What should I do?

Upgrade to a release that bundles puppet-agent 8.22.2 or 9.1.3 (Puppet Enterprise 2023.8.13, 2025.12.1 … Full textSolution from the CVE record.

CISA has set no required action, because the vulnerability is not in KEV.

No patch or vendor advisory is listed in the CVE record. Check Perforce's advisories.

Which versions are affected?

Affected

• from 2023.8.0 to before 2023.8.13
• from 2025.0.0 to before 2025.12.1
• from 2026.0.0 to before 2026.0.1

Unaffected 2023.8.13; 2025.12.1; 2026.0.1

Versions by product

Source: CISA KEV 2026.11.10, as of 10 Nov 2026; VulnCheck KEV, as of 12 Nov 2026; FIRST EPSS, as of 12 Nov 2026; CVE List, as of 12 Nov 2026. About the data.

Description

Report Deserialization Code Execution

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.

Source: CVE List, as of 12 Nov 2026. About the data.

What to do

Advisories and patches

No patch, vendor advisory or mitigation is listed in the CVE record. Check Perforce's own security advisories for a fix, and compare your version with the affected versions below.

Solution (from the CVE record)

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.

This summary is based on the CVE record as of 12 Nov 2026. Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

Source: CVE List, as of 12 Nov 2026. About the data.

Timeline