CVE-2026-117958

CVE-2026-117958: vulnerability in Mozilla Firefox

Site isolation issue in the Networking: HTTP component

Published

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3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 0.2%
Site isolation issue in the Networking: HTTP component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
Affected products
Mozilla · FirefoxMozilla · Thunderbird
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