CVE-2026-8090: Vulnerability in Mozilla Firefox
Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.
AI Analysis
Technical Summary
CVE-2026-8090 is a use-after-free vulnerability affecting the DOM networking component in Mozilla Firefox and Firefox ESR versions prior to 150.0.2, 140.10.2, and 115.35.2 respectively. The flaw involves memory safety issues that could lead to memory corruption. Mozilla's security advisories (MFSA2026-40 and MFSA2026-41) confirm that this vulnerability was addressed in the specified fixed versions. The vulnerability has a CVSS 3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L), indicating it can be exploited remotely without privileges or user interaction, potentially impacting confidentiality, integrity, and availability.
Potential Impact
The vulnerability allows remote attackers to exploit a use-after-free condition in the DOM networking component, which can lead to memory corruption. This may enable arbitrary code execution, compromising the confidentiality, integrity, and availability of the affected systems. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 150.0.2, Firefox ESR 140.10.2, and Firefox ESR 115.35.2. Users and administrators should update to these versions or later to mitigate the risk. Since this is not a cloud service, remediation depends on applying these updates. Patch status is confirmed by Mozilla advisories MFSA2026-40 and MFSA2026-41.
CVE-2026-8090: Vulnerability in Mozilla Firefox
Description
Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.
CVSS v3.1
Score 7.3high
Affected software
pkg:github/mozilla/firefox-esrRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-8090 is a use-after-free vulnerability affecting the DOM networking component in Mozilla Firefox and Firefox ESR versions prior to 150.0.2, 140.10.2, and 115.35.2 respectively. The flaw involves memory safety issues that could lead to memory corruption. Mozilla's security advisories (MFSA2026-40 and MFSA2026-41) confirm that this vulnerability was addressed in the specified fixed versions. The vulnerability has a CVSS 3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L), indicating it can be exploited remotely without privileges or user interaction, potentially impacting confidentiality, integrity, and availability.
Potential Impact
The vulnerability allows remote attackers to exploit a use-after-free condition in the DOM networking component, which can lead to memory corruption. This may enable arbitrary code execution, compromising the confidentiality, integrity, and availability of the affected systems. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 150.0.2, Firefox ESR 140.10.2, and Firefox ESR 115.35.2. Users and administrators should update to these versions or later to mitigate the risk. Since this is not a cloud service, remediation depends on applying these updates. Patch status is confirmed by Mozilla advisories MFSA2026-40 and MFSA2026-41.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-05-07T12:45:04.220Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-40/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-41/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-42/","vendor":"Mozilla"}]
Threat ID: 69fc8e61cbff5d8610ef2cb4
Added to database: 05/07/2026, 13:06:41 UTC
Last enriched: 07/29/2026, 21:34:41 UTC
Last updated: 07/31/2026, 19:30:13 UTC
Views: 127
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