Bug 2362914 (CVE-2025-4086) - CVE-2025-4086 firefox: thunderbird: Specially crafted filename could be used to obscure download type
Summary: CVE-2025-4086 firefox: thunderbird: Specially crafted filename could be used ...
Keywords:
Status: NEW
Alias: CVE-2025-4086
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-04-29 14:01 UTC by OSIDB Bzimport
Modified: 2025-09-01 08:27 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2025-04-29 14:01:45 UTC 
A specially crafted filename containing a large number of encoded newline characters could obscure the file's extension when displayed in the download dialog.
*This bug only affects Firefox for Android. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 138 and Thunderbird < 138.
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