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CVE-2026-8971 | Mondoo Vulnerability Intelligence

Vulnerability IntelligenceCVE-2026-8971

CVE-2026-8971

MEDIUM6.5

Same-origin policy bypass in the Networking: JAR component

Published May 19, 2026

Modified 1 months ago

Details

Same-origin policy bypass in the Networking: JAR component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2032604

https://www.cve.org/CVERecord?id=CVE-2026-8971

https://www.mozilla.org/security/advisories/mfsa2026-46/

https://www.mozilla.org/security/advisories/mfsa2026-50/

CVSS Analysis

CVSS v3.1

6.5

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

LowC:L

Integrity

LowI:L

Availability

NoneA:N

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

Ecosystems

Timeline

PublishedMay 19, 2026

ModifiedMay 19, 2026