Search/CVE-2026-12290
● CVE — High

CVE-2026-12290

VendormozillaProductfirefox, thunderbirdDiscoveredJun 16, 2026UpdatedOct 26, 2026

Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.

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CVSS v3.1
8.1 HIGH
EPSS
0.40%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionREQUIRED
ScopeUNCHANGED
ConfidentialityHIGH
IntegrityHIGH
AvailabilityNONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Connections
4 relationships
Timeline
disclosure → media coverage
Jun 16, 2026
Disclosure — published as a CVE record. · last revised by NVD Oct 26, 2026