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9.8 Critical

CVE-2026-0892 Memory safety bugs present in Firefox 146 and Thunderbird 146

Description

Memory safety bugs present in Firefox 146 and Thunderbird 146. 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 147 and Thunderbird 147.

Affected products and versions

Product Affected versions Fixed in
Firefox 147 earliest → < 147 147
Thunderbird 147 earliest → < 147 147

References

Timeline

  1. Published
  2. Last modified

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The 2221 CVEs of Firefox →
CVE-2026-120572 Incorrect boundary conditions in the Layout: Block and Inline component 8.8 High CVE-2026-118027 Frame poisoning in the Layout component 9.1 Critical CVE-2026-118026 Invalid pointer in the JavaScript: GC component 8.8 High CVE-2026-118025 Other issue in the SVG component 8.8 High
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