CVE-2026-8971

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

Score

CVSS 3.1 6.5 Medium

Status

Analyzed - security@mozilla.org

Published

2026-05-19

Last modified

2026-05-19

Weaknesses

CWE-346

Affected products

• Firefox (Mozilla)
• Thunderbird (Mozilla)

References

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