修复版本
150.0.0
140.10
150.0.0
CVE-2026-6750 describes a privilege escalation vulnerability located within the Graphics: WebRender component of Mozilla Firefox. Successful exploitation could allow an attacker to gain elevated privileges on the affected system. This vulnerability impacts Firefox versions 115.0.0 through 140.*, and has been resolved in Firefox 150.0.0, as well as corresponding ESR and Thunderbird releases.
The core impact of CVE-2026-6750 lies in its potential for privilege escalation. An attacker who can trigger this vulnerability could bypass standard security restrictions and execute code with higher privileges than intended. This could lead to unauthorized access to sensitive data, modification of system configurations, or even complete control over the affected Firefox instance. The WebRender component handles graphics rendering, making it a potentially attractive target for attackers seeking to exploit vulnerabilities within a core system process. While the specific attack vectors remain undisclosed, the privilege escalation nature suggests a sophisticated exploitation strategy.
CVE-2026-6750 was publicly disclosed on 2026-04-21. The vulnerability's details are currently limited, and no public proof-of-concept (PoC) code has been released. Its inclusion in a Mozilla security advisory suggests a potential for exploitation, though active campaigns are not currently confirmed. The vulnerability is not listed on the CISA KEV catalog as of this writing.
Users running Firefox versions 115.0.0 through 140.* are at risk. This includes individuals, businesses, and organizations relying on Firefox for web browsing and related tasks. Systems with legacy Firefox installations or those that haven't received regular security updates are particularly vulnerable.
• firefox: Monitor Firefox processes (firefox.exe) for unexpected memory access or unusual behavior using process monitoring tools. • windows: Use Windows Defender's advanced threat hunting capabilities to search for suspicious processes or registry modifications related to the WebRender component.
Get-Process firefox | Select-Object ProcessName, Id, CPU, WorkingSet• generic web: Examine Firefox browser logs for unusual error messages or crashes that might indicate exploitation attempts. • generic web: Check Firefox extensions for any recently installed or updated extensions from untrusted sources.
disclosure
漏洞利用状态
EPSS
0.04% (14% 百分位)
The primary mitigation for CVE-2026-6750 is to immediately upgrade Firefox to version 150.0.0 or later. If upgrading is not feasible due to compatibility issues or system constraints, consider temporarily disabling the WebRender component, although this may impact graphics performance. Monitor Firefox processes for unusual activity. There are no specific WAF or proxy rules applicable to this vulnerability, as it resides within the application itself. After upgrading, confirm the fix by verifying the Firefox version and ensuring no related error messages appear in the browser console.
Actualice a Firefox versión 150 o posterior, Firefox ESR versión 115.35 o posterior, Thunderbird versión 150 o posterior, o Thunderbird versión 140.10 o posterior para mitigar la vulnerabilidad de escalada de privilegios en el componente WebRender.
漏洞分析和关键警报直接发送到您的邮箱。
CVE-2026-6750 is a privilege escalation vulnerability in Mozilla Firefox affecting versions 115.0.0–140.*, potentially allowing attackers to gain elevated privileges.
You are affected if you are using Firefox versions 115.0.0 through 140.*. Upgrade to version 150.0.0 or later to mitigate the risk.
Upgrade Firefox to version 150.0.0 or later. If upgrading is not immediately possible, consider temporarily disabling the WebRender component.
While no active campaigns have been confirmed, the vulnerability's nature suggests a potential for exploitation, so prompt patching is recommended.
Refer to the official Mozilla security advisory for details: [https://www.mozilla.org/en-US/security/advisories/](https://www.mozilla.org/en-US/security/advisories/)