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9.6 Critical

CVE-2026-92035 Sandbox escape due to incorrect boundary conditions in the Graphics component

Description

Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Thunderbird 140.17, Firefox 156, Firefox ESR 153.3, Thunderbird 156, Thunderbird 153.3, Firefox ESR 115.42, and Firefox ESR 140.17.

Affected products and versions

Product Affected versions Fixed in
Firefox 156 earliest → < 156 156
Firefox 153.3 earliest → < 153.3 153.3
Firefox 140.17 earliest → < 140.17 140.17
Firefox 115.42 earliest → < 115.42 115.42
Thunderbird 156 earliest → < 156 156
Thunderbird 153.3 earliest → < 153.3 153.3
Thunderbird 140.17 earliest → < 140.17 140.17

References

Timeline

  1. Published
  2. Last modified

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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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