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CVE-2026-3846 | Mondoo Vulnerability Intelligence

Vulnerability IntelligenceCVE-2026-3846

CVE-2026-3846

MEDIUM6.5

Same-origin policy bypass in the CSS Parsing and Computation component

Published Mar 10, 2026

Modified 2 days ago

Fix available

Details

Same-origin policy bypass in the CSS Parsing and Computation component. This vulnerability affects Firefox < 148.0.2.

Affected Packages

Firefox

Ubuntu 14.04 LTSUbuntu 16.04 LTSUbuntu 18.04 LTSUbuntu 20.04 LTSUbuntu 22.04 LTS

Fixed in:

148.0.2

Mozilla Firefox

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

Fixed in:

148.0.2

References

WEB

https://bugzilla.mozilla.org/show_bug.cgi?id=2018400

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-3846

WEB

https://www.mozilla.org/security/advisories/mfsa2026-19/

CVSS Analysis

CVSS v3.1

6.5

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

RequiredUI:R

Scope

UnchangedS:U

Impact

Confidentiality

NoneC:N

Integrity

HighI:H

Availability

NoneA:N

6.5/CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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

PublishedMar 10, 2026

ModifiedMar 10, 2026