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CVE-2026-18809— Information disclosure in Firefox for Android and Firefox Focus for Android

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，该漏洞可能导致信息泄露。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.36% · P28

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

Affected Version Matrix 1

VendorProduct Version RangeStatus
Mozilla Firefox 153.0.3≤ * unaffected
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I. Basic Information for CVE-2026-18809

Vulnerability Information
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Vulnerability Title
Information disclosure in Firefox for Android and Firefox Focus for Android
Source: CVE Program / CVE List V5
Vulnerability Description
Information disclosure in Firefox for Android and Firefox Focus for Android. This vulnerability was fixed in Firefox 153.0.3.
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，该漏洞可能导致信息泄露。
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 153.0.3 ~ * -

II. Public POCs for CVE-2026-18809

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-18809

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Vendor Advisories for CVE-2026-18809 (1)

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2026-18809

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