CVE-2026-12324

VendormozillaProductfirefox, thunderbirdDiscoveredJun 16, 2026UpdatedOct 26, 2026

Incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

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CVSS v3.1

7.3 HIGH

EPSS

0.21%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

Related IOCs

seen in the same coverage

CVSS v3.1 Detail

Attack VectorNETWORK

Attack ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

ScopeUNCHANGED

ConfidentialityLOW

IntegrityLOW

AvailabilityLOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Connections

3 relationships

CWE-703

source

Timeline

disclosure → media coverage

Jun 16, 2026

Disclosure — published as a CVE record. · last revised by NVD Oct 26, 2026