CVSS 4.0
9.4 criticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:HCVE-2026-115731
Critical (9.4). EPSS 0.4% estimated probability of exploitation activity in the next 30 days.
On this page
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.
Severity
- EPSS
- 0.4% estimated probability of exploitation activity in the next 30 days; 31st percentile. Scored 2026-11-04. A forecast for this CVE across the internet, not for your own systems.
- CWEs
- CWE-94 Improper Control of Generation of Code (Code Injection)
CWE-502 Deserialization of Untrusted Data - Published
- Record from
- the NVD, synced
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Explain CVE-2026-115731 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-115731?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-115731?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-115731 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| Perforce Puppet Enterprise | from 2023.8.0 before 2023.8.13 |
| Perforce Puppet Enterprise | from 2025.0.0 before 2025.12.1 |
| Perforce Puppet Enterprise | from 2026.0.0 before 2026.0.1 |
Red Hat
Red Hat rates this Critical.
Until patched, avoid autosigning certificate requests without strong verification so untrusted clients cannot obtain a CA-signed agent certificate.
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Satellite 6 | openvox-server | Affected | |
| Red Hat Satellite 6 | puppetserver | Affected |
Contains Red Hat Security Data © Red Hat, Inc., licensed under CC BY 4.0. Source: https://access.redhat.com/security/data. Modified: reformatted. Red Hat's page for CVE-2026-115731.
Attack patterns (CAPEC)
- CAPEC-586 Object Injection Likelihood: Medium · Severity: High
- CAPEC-35 Leverage Executable Code in Non-Executable Files Likelihood: High · Severity: Very High
- CAPEC-77 Manipulating User-Controlled Variables Likelihood: High · Severity: Very High
- CAPEC-242 Code Injection Likelihood: High · Severity: High
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.