CVE-2026-8971

MEDIUM EPSS 10.7%
Published May 19, 20261mo ago · Modified Jun 17, 20261w ago
6.5 CVSS 3.1
Medium
Find Similar
Published May 19, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

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

CVSS Details

Base Score
6.5
Exploitability
3.9
Impact
2.5
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
10.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-346

Affected Products 2

VendorProductVersionRange
mozillafirefox* <151.0.0
mozillathunderbird* <151.0.0

References 3

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=2032604
    Permissions Required
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-46/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-50/
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.