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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.

PUBLISHED Reserved 2025-04-29 | Published 2025-04-29 | Updated 2026-04-13 | Assigner mozilla

Product status

138 (rpm)
unaffected

138 (rpm)
unaffected

Credits

Hafiizh

References

bugzilla.mozilla.org/show_bug.cgi?id=1945705

www.mozilla.org/security/advisories/mfsa2025-28/

www.mozilla.org/security/advisories/mfsa2025-31/

cve.org (CVE-2025-4086)

nvd.nist.gov (CVE-2025-4086)

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