CRITICALCVSS 9.8

CVE-2026-16387

CVE-2026-16387 updated by NVD

Modified: 2026-07-26
Sources: nvd

Summary

Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

References

https://nvd.nist.gov/vuln/detail/CVE-2026-16387

Includes data from the National Vulnerability Database (NIST). NVD data is in the public domain; this page is not endorsed by NIST.

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