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Cockpit-ws: cockpit: cockpit-ws: unauthenticated remote memory leak via cockpitlang cookie in send_login_html

CVSS 3.1 7.5 HIGHCheck source for fixed versionsKEV status unknown

cve-program · CVE-2026-76235

Published

A memory leak flaw was found in cockpit-ws. The login page handler leaks a heap allocation on every unauthenticated request that carries a CockpitLang cookie, allowing a remote unauthenticated attacker to exhaust memory on the host and cause a denial of service.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-76235

Published

cockpit

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 10",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "cockpit",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:356.4-1.el10_2",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:10.2"
                    ]
                }

cockpit

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 10",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "cockpit",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:366.1-1.el10_3",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:10.3"
                    ]
                }

cockpit

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "cockpit",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:310.10-1.el8_10",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:8::baseos"
                    ]
                }

cockpit

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "cockpit",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:356.4-1.el9_8",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:9::appstream",
                        "cpe:/o:redhat:enterprise_linux:9::baseos"
                    ]
                }

cockpit

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "cockpit",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:366.1-1.el9_9",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:9::appstream",
                        "cpe:/o:redhat:enterprise_linux:9::baseos"
                    ]
                }

cockpit

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "cockpit",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:356.4-1.el9_8",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:9::appstream",
                        "cpe:/o:redhat:enterprise_linux:9::baseos"
                    ]
                }

cockpit

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "cockpit",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:366.1-1.el9_9",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:9::appstream",
                        "cpe:/o:redhat:enterprise_linux:9::baseos"
                    ]
                }

cockpit

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 7",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "cockpit",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/o:redhat:rhel_els:7"
                    ]
                }

devspaces/udi-base-rhel10

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat OpenShift Dev Spaces",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "devspaces/udi-base-rhel10",
                    "defaultStatus": "unaffected",
                    "cpes": [
                        "cpe:/a:redhat:openshift_devspaces:3"
                    ]
                }

devspaces/udi-base-rhel9

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat OpenShift Dev Spaces",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "devspaces/udi-base-rhel9",
                    "defaultStatus": "unaffected",
                    "cpes": [
                        "cpe:/a:redhat:openshift_devspaces:3"
                    ]
                }

devspaces/udi-rhel9

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat OpenShift Dev Spaces",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "devspaces/udi-rhel9",
                    "defaultStatus": "unaffected",
                    "cpes": [
                        "cpe:/a:redhat:openshift_devspaces:3"
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 12 Nov 19:39 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current