CVE-2026-16411

criticalCVSS 9.8covered by 1 sourcefirst seen 2026-07-21

Memory safety bugs present in Firefox 152. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

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Exploitation outlook

Low exploitation risk0.32% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all EPSS-scored CVEs.

Advisory coverage (1)

criticalCVE-2026-16411: Memory safety bugs present in Firefox 152. Some of these bugs showed evidence of memory corrup…nvd · 2026-07-21

External references

NVD record for CVE-2026-16411

CVE.org record

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