PT-2026-49671 · Mozilla · Firefox+1

Lebr0Nli · Published 2026-06-16 · Updated 2026-06-16 · CVE-2026-12302

NVD

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.

Fix

Protection Mechanism Failure

Weakness Enumeration

CWE-693

Related Identifiers

CVE-2026-12302

Affected Products

Firefox

Thunderbird

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-12302 · Security Note
• https://mozilla.org/security/advisories/mfsa2026-59 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-58 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-61 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-60 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-57 · Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=2034489 · Note