Search/CVE-2026-84131
● CVE — High

CVE-2026-84131

VendormozillaProductfirefox, thunderbirdDiscoveredSep 1, 2026UpdatedSep 3, 2026

Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

View graph Watch Export
CVSS v3.1
8.8 HIGH
EPSS
0.33%
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
Sep 3, 2026 → Oct 26, 2026
▼ 0.02pp
0.35% → 0.33% over 4 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionREQUIRED
ScopeUNCHANGED
ConfidentialityHIGH
IntegrityHIGH
AvailabilityHIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Connections
3 relationships
Timeline
disclosure → media coverage
Sep 1, 2026
Disclosure — published as a CVE record.