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VULNERABILITIES

CVE-2026-0883 Details

Description

Information disclosure in the Networking component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://bugzilla.mozilla.org/show_bug.cgi?id=1989340 [email protected]Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-01/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-03/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-04/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-05/ [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-200Exposure of Sensitive Information to an Unauthorized ActorCISA-ADP

Affected Products

ProductVersions
mozilla firefox
< 140.7.0
< 147.0

CPE

  • cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*

Remediation

  • No remediation found in references.
mozilla thunderbird
< 140.7.0
< 147.0

CPE

  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*

Remediation

  • No remediation found in references.

Change History

7 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-0883
NVD Published Date:
Jan 13, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-0883 Details - Not Deferred