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THREAT OPS › Threat News › [NVD] CVE-2026-0891 (HIGH 8.1) — 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 vulnerabilit

[NVD] CVE-2026-0891 (HIGH 8.1) — 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 vulnerabilit

lownvdPublished 2026-01-13

CVE-2026-0891 CVSS: 8.1 HIGH Published: 2026-01-13T14:16:39.627

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 was fixed in Firefox 147, Firefox ESR 140.7, Thunderb

Indicators of compromise

CVE-2026-0891cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-0891