CVE-2026-92026: Vulnerability in Mozilla Firefox
Use-after-free in the Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in the Networking component of Mozilla Firefox. Use-after-free vulnerabilities occur when a program continues to use a pointer after the memory it points to has been freed, potentially leading to memory corruption or execution of arbitrary code. Mozilla has fixed this issue in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3. The vendor advisory classifies the impact as high and recommends updating to these versions to remediate the vulnerability.
Potential Impact
The vulnerability could allow an attacker to exploit memory safety issues in the Networking component, potentially leading to arbitrary code execution or application crashes. The impact is rated high by the vendor. There are no reports of active exploitation in the wild at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3. Users and administrators should update to these versions or later to ensure protection. No additional mitigations are specified or required beyond applying the official updates.
CVE-2026-92026: Vulnerability in Mozilla Firefox
Description
Use-after-free in the Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16.
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
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
This vulnerability involves a use-after-free condition in the Networking component of Mozilla Firefox. Use-after-free vulnerabilities occur when a program continues to use a pointer after the memory it points to has been freed, potentially leading to memory corruption or execution of arbitrary code. Mozilla has fixed this issue in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3. The vendor advisory classifies the impact as high and recommends updating to these versions to remediate the vulnerability.
Potential Impact
The vulnerability could allow an attacker to exploit memory safety issues in the Networking component, potentially leading to arbitrary code execution or application crashes. The impact is rated high by the vendor. There are no reports of active exploitation in the wild at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3. Users and administrators should update to these versions or later to ensure protection. No additional mitigations are specified or required beyond applying the official updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-15T12:33:46.212Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-92/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-93/","vendor":"Mozilla"}]
Threat ID: 6aa93e6255bf5e2cf5d30fe5
Added to database: 09/15/2026, 12:47:30 UTC
Last enriched: 09/15/2026, 13:31:59 UTC
Last updated: 09/16/2026, 04:01:24 UTC
Views: 8
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