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THREAT OPS › Threat News › [NVD] CVE-2026-0877 (HIGH 8.1) — Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

[NVD] CVE-2026-0877 (HIGH 8.1) — Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

lownvdPublished 2026-01-13

CVE-2026-0877 CVSS: 8.1 HIGH Published: 2026-01-13T14:16:38.270

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

Indicators of compromise

CVE-2026-0877cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-0877