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CVE-2026-2760— Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component

Quick assessment

Affected
Mozilla Firefox
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mozilla Firefox等都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Firefox ESR是Firefox(Web浏览器)的一个延长支持版本。Mozilla Thunderbird是一套从Mozilla Application Suite独立出来的电子邮件客户端软件。 Mozilla多款产品存在安全漏洞，该漏洞源于Graphics: WebRender组件边界条件不正确，可能导致沙箱逃逸。以下产品及版本受到影响：Firefox 148之

AI Predicted 7.8 Difficulty: Moderate EPSS 0.40% · P33

Possible ATT&CK Techniques 1 AI

T1210 · Exploitation of Remote Services

Affected Version Matrix 5

VendorProduct Version RangeStatus
Mozilla Firefox 115.33≤ 115.* unaffected
140.8≤ 140.* unaffected
148≤ * unaffected
Mozilla Thunderbird 140.8≤ 140.* unaffected
148≤ * unaffected
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I. Basic Information for CVE-2026-2760

Vulnerability Information
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Vulnerability Title
Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component
Source: CVE Program / CVE List V5
Vulnerability Description
Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Mozilla多款产品 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox等都是美国Mozilla基金会的产品。Mozilla Firefox是一款开源Web浏览器。Mozilla Firefox ESR是Firefox(Web浏览器)的一个延长支持版本。Mozilla Thunderbird是一套从Mozilla Application Suite独立出来的电子邮件客户端软件。 Mozilla多款产品存在安全漏洞，该漏洞源于Graphics: WebRender组件边界条件不正确，可能导致沙箱逃逸。以下产品及版本受到影响：Firefox 148之
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mozilla Firefox 115.33 ~ 115.* -
Mozilla Thunderbird 140.8 ~ 140.* -

II. Public POCs for CVE-2026-2760

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III. Intelligence Information for CVE-2026-2760

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Vendor Advisories for CVE-2026-2760 (5)

Same Patch Batch · Mozilla · 2026-02-24 · 52 CVEs total

CVE-2026-2773 Incorrect boundary conditions in the Web Audio component
CVE-2026-2757 Incorrect boundary conditions in the WebRTC: Audio/Video component
CVE-2026-2758 Use-after-free in the JavaScript: GC component
CVE-2026-2763 Use-after-free in the JavaScript Engine component
CVE-2026-2761 Sandbox escape in the Graphics: WebRender component
CVE-2026-2762 Integer overflow in the JavaScript: Standard Library component
CVE-2026-2764 JIT miscompilation, use-after-free in the JavaScript Engine: JIT component
CVE-2026-2759 Incorrect boundary conditions in the Graphics: ImageLib component
CVE-2026-2771 Undefined behavior in the DOM: Core & HTML component
CVE-2026-2772 Use-after-free in the Audio/Video: Playback component
CVE-2026-2770 Use-after-free in the DOM: Bindings (WebIDL) component
CVE-2026-2774 Integer overflow in the Audio/Video component
CVE-2026-2775 Mitigation bypass in the DOM: HTML Parser component
CVE-2026-2776 Sandbox escape due to incorrect boundary conditions in the Telemetry component in External
CVE-2026-2777 Privilege escalation in the Messaging System component
CVE-2026-2778 Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component
CVE-2026-2779 Incorrect boundary conditions in the Networking: JAR component
CVE-2026-2780 Privilege escalation in the Netmonitor component
CVE-2026-2781 Integer overflow in the Libraries component in NSS
CVE-2026-2782 Privilege escalation in the Netmonitor component

Showing top 20 of 52 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2026-2760

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