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CVE Vulnerability Details :
CVE-2026-0881
PUBLISHED
More InfoOfficial Page
Assigner-mozilla
Assigner Org ID-f16b083a-5664-49f3-a51e-8d479e5ed7fe
View Known Exploited Vulnerability (KEV) details
Published At-13 Jan, 2026 | 13:30
Updated At-13 Apr, 2026 | 13:51
Rejected At-
▼CVE Numbering Authority (CNA)
Sandbox escape in the Messaging System component

Sandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.

Affected Products
Vendor
Mozilla CorporationMozilla
Product
Firefox
Versions
Unaffected
  • From 147 through * (rpm)
Vendor
Mozilla CorporationMozilla
Product
Thunderbird
Versions
Unaffected
  • From 147 through * (rpm)
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Andrew McCreight
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://bugzilla.mozilla.org/show_bug.cgi?id=2005845
N/A
https://www.mozilla.org/security/advisories/mfsa2026-01/
N/A
https://www.mozilla.org/security/advisories/mfsa2026-04/
N/A
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=2005845
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-01/
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-04/
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Problem Types
TypeCWE IDDescription
CWECWE-693CWE-693 Protection Mechanism Failure
CWECWE-284CWE-284 Improper Access Control
Type: CWE
CWE ID: CWE-693
Description: CWE-693 Protection Mechanism Failure
Type: CWE
CWE ID: CWE-284
Description: CWE-284 Improper Access Control
Metrics
VersionBase scoreBase severityVector
3.110.0CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Version: 3.1
Base score: 10.0
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found