Moole Vulnerability Database

Find real vulnerabilities before they ship

Critical

CVE-2026-8956

Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

VectorNETWORK

PublishedMay 19, 2026, 14:16

Published Bysecurity@mozilla.org

Base Score

Score9.8

Affected Versions

No affected versions found.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2032427
https://www.mozilla.org/security/advisories/mfsa2026-46/
https://www.mozilla.org/security/advisories/mfsa2026-48/
https://www.mozilla.org/security/advisories/mfsa2026-50/
https://www.mozilla.org/security/advisories/mfsa2026-51/

Weakness Type

CWE-190

CVSS Metrics

Base Score

9.8

Vector String

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

Base SeverityCritical

Version

3.1

Attack Vector (AV)

NETWORK