CVE-2026-109732: Vulnerability in Mozilla Firefox
Description
Use-after-free in the DOM: Streams component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVSS v3.1
Score 5.4medium
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-109732 is a use-after-free vulnerability affecting the DOM Streams component in Mozilla Firefox. This flaw could potentially lead to memory corruption or other unintended behavior. Mozilla has fixed this vulnerability in Firefox 158, Firefox ESR 115.43, and Firefox ESR 153.5.
Potential Impact
The vulnerability could allow an attacker to exploit memory management errors in the DOM Streams component, potentially leading to application crashes or arbitrary code execution. However, no known exploits in the wild have been reported.
Mitigation Recommendations
Users should update to Firefox 158, Firefox ESR 115.43, or Firefox ESR 153.5 or later to remediate this vulnerability. Since official fixes are available, applying these updates is the recommended action.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:29:38.579Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-107/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-108/","vendor":"Mozilla"}]
Threat ID: 6ace2c482cdf04f65661d538
Added to database: 10/13/2026, 13:04:08 UTC
Last enriched: 10/13/2026, 13:49:24 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 2
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