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

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4439-1 firefox-esr security update
Debian DLA Debian DLA DLA-4442-1 thunderbird security update
Debian DSA Debian DSA DSA-6101-1 firefox-esr security update
Debian DSA Debian DSA DSA-6103-1 thunderbird security update
Ubuntu USN Ubuntu USN USN-7991-1 Thunderbird vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 13 Apr 2026 14:30:00 +0000

Type Values Removed Values Added
Description Information disclosure in the Networking component. This vulnerability affects Firefox < 147, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7. Information disclosure in the Networking component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

Thu, 22 Jan 2026 23:00:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla thunderbird
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
Vendors & Products Mozilla thunderbird

Thu, 15 Jan 2026 09:45:00 +0000

Type Values Removed Values Added
Description Information disclosure in the Networking component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7. Information disclosure in the Networking component. This vulnerability affects Firefox < 147, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7.
References

Wed, 14 Jan 2026 11:15:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Mozilla firefox Esr
Vendors & Products Mozilla
Mozilla firefox
Mozilla firefox Esr

Wed, 14 Jan 2026 00:15:00 +0000


Tue, 13 Jan 2026 16:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-200
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 13 Jan 2026 14:00:00 +0000

Type Values Removed Values Added
Description Information disclosure in the Networking component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7.
Title Information disclosure in the Networking component
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-04-13T13:51:51.032Z

Reserved: 2026-01-13T13:30:55.877Z

Link: CVE-2026-0883

cve-icon Vulnrichment

Updated: 2026-01-13T15:47:29.531Z

cve-icon NVD

Status : Modified

Published: 2026-01-13T14:16:38.853

Modified: 2026-04-13T15:17:17.223

Link: CVE-2026-0883

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-01-13T13:30:56Z

Links: CVE-2026-0883 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-01-14T11:09:14Z

Weaknesses