Allocation of Resources Without Limits or Throttling Affecting cockpit package, versions <0:356.4.1-1.el9_8


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
1.13% (67th percentile)

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  • Snyk IDSNYK-RHEL9-COCKPIT-22525541
  • published13 Nov 2026
  • disclosed10 Nov 2026

Introduced: 10 Nov 2026

NewCVE-2026-91150  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade RHEL:9 cockpit to version 0:356.4.1-1.el9_8 or higher.
This issue was patched in RHSA-2026:99601.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cockpit package and not the cockpit package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

A flaw was found in Cockpit. This vulnerability allows a remote attacker, without prior authentication, to send specially crafted fragmented WebSocket messages. These messages accumulate without a total-size limit, leading to unbounded memory exhaustion and a denial of service in the cockpit-ws service.

CVSS Base Scores

version 3.1