CVE-2026-12297: Vulnerability in Mozilla Firefox
CVE-2026-12297 is a sandbox escape vulnerability in Mozilla Firefox caused by incorrect boundary conditions in the Networking component. This issue allows an attacker to escape the browser's sandbox environment, potentially leading to privilege escalation or arbitrary code execution. The vulnerability was fixed in Firefox 152, Firefox ESR 140.12, and Firefox ESR 115.37. The vendor has released official patches addressing this and multiple other high-impact security issues in these versions.
AI Analysis
Technical Summary
CVE-2026-12297 is a sandbox escape vulnerability in the Networking component of Mozilla Firefox due to incorrect boundary conditions. This flaw could allow an attacker to break out of the sandbox security model, which is designed to isolate web content and limit the impact of exploits. Mozilla fixed this vulnerability in Firefox 152, Firefox ESR 140.12, and Firefox ESR 115.37 as part of a broader security update addressing multiple high-impact bugs. The vendor advisories confirm the high impact and the availability of patches in these versions.
Potential Impact
The vulnerability enables sandbox escape, which can lead to an attacker gaining elevated privileges or executing arbitrary code outside the browser's restricted environment. This significantly increases the risk of system compromise if exploited. The impact is rated high by the vendor.
Mitigation Recommendations
Official patches fixing this vulnerability are available in Firefox 152, Firefox ESR 140.12, and Firefox ESR 115.37. Users and administrators should update to these versions or later to remediate the issue. There is no indication that additional mitigation steps are required beyond applying the official updates.
CVE-2026-12297: Vulnerability in Mozilla Firefox
Description
CVE-2026-12297 is a sandbox escape vulnerability in Mozilla Firefox caused by incorrect boundary conditions in the Networking component. This issue allows an attacker to escape the browser's sandbox environment, potentially leading to privilege escalation or arbitrary code execution. The vulnerability was fixed in Firefox 152, Firefox ESR 140.12, and Firefox ESR 115.37. The vendor has released official patches addressing this and multiple other high-impact security issues in these versions.
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-2026-12297 is a sandbox escape vulnerability in the Networking component of Mozilla Firefox due to incorrect boundary conditions. This flaw could allow an attacker to break out of the sandbox security model, which is designed to isolate web content and limit the impact of exploits. Mozilla fixed this vulnerability in Firefox 152, Firefox ESR 140.12, and Firefox ESR 115.37 as part of a broader security update addressing multiple high-impact bugs. The vendor advisories confirm the high impact and the availability of patches in these versions.
Potential Impact
The vulnerability enables sandbox escape, which can lead to an attacker gaining elevated privileges or executing arbitrary code outside the browser's restricted environment. This significantly increases the risk of system compromise if exploited. The impact is rated high by the vendor.
Mitigation Recommendations
Official patches fixing this vulnerability are available in Firefox 152, Firefox ESR 140.12, and Firefox ESR 115.37. Users and administrators should update to these versions or later to remediate the issue. There is no indication that additional mitigation steps are required beyond applying the official updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-06-15T15:08:09.151Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-57/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-58/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-59/","vendor":"Mozilla"}]
Threat ID: 6a314c7b0b89be6888b4cbd9
Added to database: 6/16/2026, 1:15:39 PM
Last enriched: 6/16/2026, 1:46:40 PM
Last updated: 6/17/2026, 4:58:30 AM
Views: 6
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