Use-after-free in the Storage: Bucket File System component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Mozilla Firefox affected
Version Status Constraints
153.5 unaffected ≤ 153.*
158 unaffected ≤ *
Mozilla Thunderbird affected
Version Status Constraints
153.5 unaffected ≤ 153.*
158 unaffected ≤ *

No data.

No data.

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2058651 cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-106/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-108/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-109/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-110/ cve-icon cve-icon
History

Tue, 13 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 13 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Description Use-after-free in the Storage: Bucket File System component. This vulnerability was fixed in Firefox 158 and Firefox ESR 153.5. Use-after-free in the Storage: Bucket File System component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
References

Tue, 13 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}

Tue, 13 Oct 2026 13:00:00 +0000

Type Values Removed Values Added
Description Use-after-free in the Storage: Bucket File System component. This vulnerability was fixed in Firefox 158 and Firefox ESR 153.5.
Title Use-after-free in the Storage: Bucket File System component
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-10-13T18:17:04.429Z

Reserved: 2026-10-13T00:29:46.940Z

Link: CVE-2026-109741

cve-icon Vulnrichment

Updated: 2026-10-13T14:13:40.920Z

cve-icon NVD

Status : Deferred

Published: 2026-10-13T13:17:24.693

Modified: 2026-10-13T19:18:38.143

Link: CVE-2026-109741

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-13T17:30:14Z

Weaknesses