Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox | affected |
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Project Subscriptions
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Advisories
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Fixes
Solution
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Workaround
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References
History
Tue, 19 May 2026 13:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11. | |
| Title | Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component | |
| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: mozilla
Published:
Updated: 2026-05-19T12:29:55.560Z
Reserved: 2026-05-19T12:29:54.802Z
Link: CVE-2026-8959
Vulnrichment
No data.
NVD
Status : Undergoing Analysis
Published: 2026-05-19T14:16:52.280
Modified: 2026-05-19T14:23:47.477
Link: CVE-2026-8959
Redhat
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OpenCVE Enrichment
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Weaknesses
No weakness.