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// CVE · PUBLISHED 2026-08-18

CVE-2026-74989

Mozilla / Firefox · Mozilla / Thunderbird

9.8 · CVSS 3.1Critical

Description

Internally found bugs present in Firefox 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154 and Thunderbird 154.

References

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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.