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CVE-2026-12290— Memory safety bug fixed in Firefox 152

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是Mozilla基金会开源的一款Web浏览器。 Mozilla Firefox存在安全漏洞，该漏洞源于内存安全问题，可能导致攻击者利用该漏洞进行攻击。

AI Predicted 8.0 Difficulty: Easy EPSS 0.40% · P31

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 5

VendorProduct Version RangeStatus
Mozilla Firefox 115.37≤ 115.* unaffected
140.12≤ 140.* unaffected
152≤ * unaffected
Mozilla Thunderbird 140.12≤ 140.* unaffected
152≤ * unaffected
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I. Basic Information for CVE-2026-12290

Vulnerability Information
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Vulnerability Title
Memory safety bug fixed in Firefox 152
Source: CVE Program / CVE List V5
Vulnerability Description
Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
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 Firefox 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox是Mozilla基金会开源的一款Web浏览器。 Mozilla Firefox存在安全漏洞，该漏洞源于内存安全问题，可能导致攻击者利用该漏洞进行攻击。
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 115.37 ~ 115.* -
Mozilla Thunderbird 140.12 ~ 140.* -

II. Public POCs for CVE-2026-12290

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III. Intelligence Information for CVE-2026-12290

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Vendor Advisories for CVE-2026-12290 (5)

Same Patch Batch · Mozilla · 2026-06-16 · 44 CVEs total

CVE-2026-12301 Memory safety bug fixed in Firefox 152
CVE-2026-12298 Memory safety bug fixed in Firefox 152
CVE-2026-12299 JIT miscompilation in the DOM: Core & HTML component
CVE-2026-12297 Sandbox escape due to incorrect boundary conditions in the Networking component
CVE-2026-12294 Sandbox escape in the DOM: Workers component
CVE-2026-12293 Use-after-free in the Graphics: WebGPU component
CVE-2026-12292 Incorrect boundary conditions in the Web Audio component
CVE-2026-12291 Use-after-free in the Networking: HTTP component
CVE-2026-12289 Privilege escalation in the Graphics: WebRender component
CVE-2026-12295 Sandbox escape in the DOM: Navigation component
CVE-2026-12300 Memory safety bug fixed in Firefox 152
CVE-2026-12302 Mitigation bypass in the DOM: Security component
CVE-2026-12303 Information disclosure due to incorrect boundary conditions in the Graphics: WebGPU compon
CVE-2026-12304 Same-origin policy bypass in the Networking: Cookies component
CVE-2026-12305 Memory safety bug fixed in Firefox 152
CVE-2026-12306 Memory safety bug fixed in Firefox 152
CVE-2026-12307 Memory safety bug fixed in Firefox 152
CVE-2026-12308 Memory safety bug fixed in Firefox 152
CVE-2026-12309 Memory safety bug fixed in Firefox 152
CVE-2026-12310 Memory safety bug fixed in Firefox 152

Showing top 20 of 44 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2026-12290

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