🔐 CVE Alert

CVE-2026-8971

MEDIUM 6.5

Same-origin policy bypass in the Networking: JAR component

CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th

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

Vendor mozilla
Product firefox
Ecosystems
Industries
Technology
Published May 19, 2026
Last Updated May 19, 2026
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Affected Versions

Mozilla / Firefox
All versions affected
Mozilla / Thunderbird
All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗
bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=2032604 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-46/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-50/

Credits

Surya Dev Singh