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CVE-2026-0892

CRITICAL
9.8
CVSS 3.1
Description
Memory safety bugs present in Firefox 146 and Thunderbird 146. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 147 and Thunderbird 147.

Metadata

CVE ID
CVE-2026-0892
State
PUBLISHED
Assigner
mozilla
Reserved
2026-01-13 13:30 UTC
Published
2026-01-13 13:30 UTC
Last updated
2026-04-13 13:52 UTC
Primary CWE
CWE-119
CWE-119 Improper Restriction of Operations within the Bounds…
Vendor / Product
Mozilla / Firefox
Sources
cve.org  ·  NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
total
Affected products (2)
VendorProductPlatformVersions
Mozilla Firefox — 147 ≤ *
Mozilla Thunderbird — 147 ≤ *
Weakness (CWE)
CWESourceDescription
CWE-119 adp CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.8 CRITICAL 3.1 adp CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References (3)
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