EM-20261103-POSJ VulnerabilityCritical severity

Critical puppetserver Vulnerability (CVE-2026-115731)

CVE-2026-115731

Status

Developing

Since Nov 03 21:17 UTC: signals keep joining.

First Signal: Nov 03 20:40 UTCC41 Red Hat Security Data
Page Born: Nov 03 21:17 UTCsecond source joined
Last Signal: Nov 03 21:17 UTC20 hours before snapshot
Sources: 21 official · 1 research, news or crowd
Open For: 18 hoursso far

Life Of This Page

1
Born

Nov 03 21:17 UTC
A second, independent source names it.
2
Developing · Now

Nov 03 21:17 UTC
New signals join; severity can move.
3
Confirmed

Not yet
CISA KEV lists it, or exploitation in the wild is reported.
4
Resolved

Not yet
Past the fix deadline and 14 days with no new signal.
5
Archived

Not yet
30 days after resolved. Read only; the link keeps working. Reopens if it comes back.

The address and ID never change. A correction is logged, never overwritten. If two pages turn out to be one incident, the later one points to the earlier.

Vulnerability Lifecycle

Disclosed: reached

Nov 03 21:17 UTC
C6 NVD published
Scored: reached

Nov 03 21:17 UTC
CVSS 9.4 · EPSS 0.4%
Exploited: not yet

Not yet
No exploitation reported
Advisories: not yet

Not yet
None yet
Vendor Response: reached

Nov 03 20:40 UTC
C41 published
Resolved: not yet

Not yet
After 14 quiet days

Timeline

Point at a mark to read it. Squares are signals, colored by severity; every one is also listed under Signals.

Signals

Nov 03 21:17 UTCCVE-2026-115731 (CVSS 9.4) (opens source in a new tab) 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 P… Crit severityDatabaseC6 NVD CVE API 2.0
Nov 03 20:40 UTCRed Hat: CVE-2026-115731 (critical) (opens source in a new tab) puppetserver: openvox-agent: openvox-server: puppetserver: authenticated remote code execution via report event deserialization Crit severityVendorC41 Red Hat Security Data