Medium severity6.5NVD Advisory· Published Apr 29, 2025· Updated Apr 13, 2026
CVE-2025-4086
CVE-2025-4086
Description
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 Thunderbird for Android. Other versions of Thunderbird are unaffected.*. This vulnerability was fixed in Firefox 138 and Thunderbird 138.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
18- Range: <138
- osv-coords15 versionspkg:deb/ubuntu/firefox@136.0+build3-0ubuntu0.20.04.1?arch=source&distro=focalpkg:deb/ubuntu/mozjs102@102.15.1-0ubuntu0.22.04.1?arch=source&distro=jammypkg:deb/ubuntu/mozjs102@102.15.1-3ubuntu2?arch=source&distro=noblepkg:deb/ubuntu/mozjs115@115.10.0-1?arch=source&distro=noblepkg:deb/ubuntu/mozjs115@115.16.0-1?arch=source&distro=oracularpkg:deb/ubuntu/mozjs115@115.21.0-1?arch=source&distro=pluckypkg:deb/ubuntu/mozjs38@38.8.0~repack1-0ubuntu4?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/mozjs52@52.9.1-0ubuntu0.18.04.1?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/mozjs52@52.9.1-1ubuntu3?arch=source&distro=focalpkg:deb/ubuntu/mozjs68@68.6.0-1ubuntu1?arch=source&distro=focalpkg:deb/ubuntu/mozjs78@78.15.0-4ubuntu1?arch=source&distro=jammypkg:deb/ubuntu/mozjs91@91.10.0-0ubuntu1?arch=source&distro=jammypkg:deb/ubuntu/thunderbird@1:115.18.0+build1-0ubuntu0.20.04.1?arch=source&distro=focalpkg:deb/ubuntu/thunderbird@1:115.18.0+build1-0ubuntu0.22.04.1?arch=source&distro=jammypkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweed
>= 0+ 14 more
- (no CPE)range: >= 0
- (no CPE)range: >= 0
- (no CPE)range: >= 0
- (no CPE)range: >= 0
- (no CPE)range: >= 0
- (no CPE)range: >= 0
- (no CPE)range: >= 0
- (no CPE)range: >= 0
- (no CPE)range: >= 0
- (no CPE)range: >= 0
- (no CPE)range: >= 0
- (no CPE)range: >= 0
- (no CPE)range: >= 0
- (no CPE)range: >= 0
- (no CPE)range: < 138.0-1.1
Patches
Vulnerability mechanics
References
3- www.mozilla.org/security/advisories/mfsa2025-28/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-31/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
News mentions
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