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CVE-2026-2803 | Mondoo Vulnerability Intelligence

Vulnerability IntelligenceCVE-2026-2803

CVE-2026-2803

HIGH7.5

Information disclosure, mitigation bypass in the Settings UI component

Published Feb 24, 2026

Modified 6 days ago

Fix available

Details

Information disclosure, mitigation bypass in the Settings UI component. This vulnerability affects Firefox < 148 and Thunderbird < 148.

Affected Packages

Firefox

Ubuntu 14.04 LTSUbuntu 16.04 LTSUbuntu 18.04 LTSUbuntu 20.04 LTSUbuntu 22.04 LTS

Fixed in:

148

Mozilla Firefox

Windows 10 (1507)Windows 10 (1607) / Server 2016Windows 10 (1809) / Server 2019Windows 10 (1903)Windows 10 (1909)

Fixed in:

148

References

WEB

https://bugzilla.mozilla.org/show_bug.cgi?id=2012012

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-2803

WEB

https://www.mozilla.org/security/advisories/mfsa2026-13/

WEB

https://www.mozilla.org/security/advisories/mfsa2026-16/

CVSS Analysis

CVSS v3.1

7.5

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

NoneI:N

Availability

NoneA:N

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

Ecosystems(28)

Ubuntu 14.04 LTS Ubuntu 16.04 LTS Ubuntu 18.04 LTS Ubuntu 20.04 LTS Ubuntu 22.04 LTS

Timeline

PublishedFeb 24, 2026

ModifiedFeb 26, 2026