A flaw was found in rsyslog. When using the imdtls input module configured for name or fingerprint authentication, permitted-peer identity checks are not enforced after a successful DTLS handshake. A remote attacker possessing a valid certificate signed by the listener's trusted Certificate Authority could bypass peer restrictions and inject unauthorized syslog records into the input stream.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Rsyslog
  • Rsyslog

No data.

No data.

References
Link Providers
https://nvd.nist.gov/vuln/detail/CVE-2026-93402 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-93402 cve-icon
History

Tue, 29 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
First Time appeared Rsyslog
Rsyslog rsyslog
Vendors & Products Rsyslog
Rsyslog rsyslog

Tue, 29 Sep 2026 13:15:00 +0000

Type Values Removed Values Added
Description A flaw was found in rsyslog. When using the imdtls input module configured for name or fingerprint authentication, permitted-peer identity checks are not enforced after a successful DTLS handshake. A remote attacker possessing a valid certificate signed by the listener's trusted Certificate Authority could bypass peer restrictions and inject unauthorized syslog records into the input stream.
Title rsyslog: rsyslog: imdtls permitted-peer authorization bypass
Weaknesses CWE-287
References
Metrics threat_severity

None

 cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N'}

threat_severity

Low
cve-icon MITRE

No data.

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

Severity : Low

Publid Date: 2026-09-22T16:00:00Z

Links: CVE-2026-93402 - Bugzilla