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CVE-2026-91149
Published:September 18, 2026
Updated:October 13, 2026
A flaw was found in Cockpit. An unauthenticated remote attacker can exploit this vulnerability by initiating and sustaining numerous simultaneous connections to the "cockpit-tls" service. This forces the service to create an unbounded number of detached threads, consuming system resources such as memory and file descriptors. The primary consequence is a denial of service (DoS), leading to degradation or complete unavailability of the Cockpit service for legitimate users.
Affected Packages
https://github.com/cockpit-project/cockpit.git (GITHUB):
Affected version(s) =367 <368
Fix Suggestion:
Update to version 368
https://github.com/cockpit-project/cockpit.git (GITHUB):
Affected version(s) >=205 <356.4
Fix Suggestion:
Update to version 356.4
https://github.com/cockpit-project/cockpit.git (GITHUB):
Affected version(s) >=357 <366.1
Fix Suggestion:
Update to version 366.1
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Allocation of Resources Without Limits or Throttling
EPSS
Base Score:
0.35