Is CVE-2019-15149 actively exploited?

No active exploitation of CVE-2019-15149 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-15149 be exploited remotely?

Yes. CVE-2019-15149 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2019-15149?

CVE-2019-15149 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2019-15149

CRITICAL

CVE-2019-15149

CWE-254Published: August 18, 2019· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

core.py in Mitogen before 0.2.8 has a typo that drops the unidirectional-routing protection mechanism in the case of a child that is initiated by another child. The Ansible extension is unaffected. NOTE: the vendor disputes this issue because it is exploitable only in conjunction with hypothetical other factors, i.e., an affected use case within a library caller, and a bug in the message receiver policy code that led to reliance on this extra protection mechanism

NVD Source

Technical Analysis

CVE-2019-15149 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.