Memory safety bugs present in Firefox ESR 140.6, Thunderbird ESR 140.6, 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 affects Firefox < 147 and Firefox ESR < 140.7.
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History
Tue, 13 Jan 2026 15:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-119 | |
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cvssV3_1
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Tue, 13 Jan 2026 14:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Memory safety bugs present in Firefox ESR 140.6, Thunderbird ESR 140.6, 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 affects Firefox < 147 and Firefox ESR < 140.7. | |
| Title | Memory safety bugs fixed in Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147 | |
| References |
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Status: PUBLISHED
Assigner: mozilla
Published:
Updated: 2026-01-13T14:33:38.952Z
Reserved: 2026-01-13T13:30:59.286Z
Link: CVE-2026-0891
Updated: 2026-01-13T14:33:02.676Z
Status : Received
Published: 2026-01-13T14:16:39.627
Modified: 2026-01-13T15:16:00.760
Link: CVE-2026-0891
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OpenCVE Enrichment
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