CVE-2026-109783

EUVD-2026-98543
Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox ESR 153.5 and Thunderbird 153.5.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
UNKNOWN
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Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 8.97%
Debian logo
Debian Releases
Debian Product
Codename
firefox-esr
bookworm
vulnerable
bookworm (security)
vulnerable
forky
vulnerable
sid
153.5.0esr-1
fixed
trixie
vulnerable
trixie (security)
153.5.0esr-1~deb13u1
fixed
Vulnerability Media Exposure
References
https://bugzilla.mozilla.org/show_bug.cgi?id=2075533
https://www.mozilla.org/security/advisories/mfsa2026-108/
https://www.mozilla.org/security/advisories/mfsa2026-110/