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CVE-2026-92049

Use-after-free in the Widget: Win32 component

cve-program · severity unknownCVSS unknownCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-92049

Published

Use-after-free in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-92049

Published

Firefox

Vendor product

Publisher's version information

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

{
                    "product": "Firefox",
                    "vendor": "Mozilla",
                    "versions": [
                        {
                            "status": "unaffected",
                            "version": "153.3",
                            "lessThanOrEqual": "153.*",
                            "versionType": "rpm"
                        },
                        {
                            "status": "unaffected",
                            "version": "156",
                            "lessThanOrEqual": "*",
                            "versionType": "rpm"
                        }
                    ]
                }

Thunderbird

Vendor product

Publisher's version information

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

{
                    "product": "Thunderbird",
                    "vendor": "Mozilla",
                    "versions": [
                        {
                            "status": "unaffected",
                            "version": "153.3",
                            "lessThanOrEqual": "153.*",
                            "versionType": "rpm"
                        },
                        {
                            "status": "unaffected",
                            "version": "156",
                            "lessThanOrEqual": "*",
                            "versionType": "rpm"
                        }
                    ]
                }

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