---
id: CVE-2026-91142
title: A flaw was found in Cockpit
summary: >-
  A flaw was found in Cockpit. An authenticated local user with a large user
  identifier (UID) can cause unauthorized modification and disclosure of login
  records. On 32-bit systems, an integer overflow during session accounting
  allows the …
severity: low
cvss: 3.6
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-190
  - CWE-787
vendor: Red Hat
product: cockpit
affected:
  - cockpit (all versions)
  - cockpit
  - cockpit
  - cockpit (all versions)
  - devspaces/udi-base-rhel10
  - devspaces/udi-base-rhel9
  - devspaces/udi-rhel9
published: '2026-09-18'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T18:19:43.197'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91142'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-91142'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2479459'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91142.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-91142'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91142'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00119
epssPercentile: 0.01774
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T17:09:31.218316Z'
ingestedAt: '2026-09-18T16:45:41.403Z'
---

## Overview

A flaw was found in Cockpit. An authenticated local user with a large user identifier (UID) can cause unauthorized modification and disclosure of login records. On 32-bit systems, an integer overflow during session accounting allows the user's login process to read or overwrite the legacy log entries of other accounts.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Dev Spaces · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91142.json)