Search/CVE-2025-8036
● CVE — High

CVE-2025-8036

VendormozillaProductfirefox, thunderbirdDiscoveredJul 22, 2025UpdatedOct 5, 2026

Thunderbird cached CORS preflight responses across IP address changes. This allowed circumventing CORS with DNS rebinding. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1.

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CVSS v3.1
8.1 HIGH
EPSS
0.45%
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
EPSS Trend
Aug 16, 2026 → Oct 24, 2026
▲ 0.03pp
0.42% → 0.45% over 5 tracked changes
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
3 relationships
Timeline
disclosure → media coverage
Jul 22, 2025
Disclosure — published as a CVE record. · last revised by NVD Oct 5, 2026