PT-2026-41923 · Mozilla · Firefox+1

Atsushi Sada · Published 2026-05-19 · Updated 2026-05-27 · CVE-2026-8969

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 151 Thunderbird versions prior to 151

Description A mitigation bypass exists within the DOM security component.

Fix

Protection Mechanism Failure

Weakness Enumeration

CWE-693

Related Identifiers

CVE-2026-8969

OPENSUSE-SU-2026:10863-1

Affected Products

Firefox

Thunderbird

References · 43

• https://cve.org/CVERecord?id=CVE-2026-8969 · Security Note
• https://mozilla.org/en-US/security/advisories/mfsa2026-46/#CVE-2026-8969 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10863-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-8969 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-8969 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-8969 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-50 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-46 · Vendor Advisory
• https://suse.com/security/cve/CVE-2026-8958 · Note
• https://suse.com/security/cve/CVE-2026-8961 · Note
• https://suse.com/security/cve/CVE-2026-8951 · Note
• https://suse.com/security/cve/CVE-2026-8949 · Note
• https://suse.com/security/cve/CVE-2026-8959 · Note
• https://twitter.com/VulmonFeeds/status/2056788980994101545 · Twitter Post
• https://suse.com/security/cve/CVE-2026-8962 · Note