PT-2026-49695 · Mozilla · Thunderbird+1

Ashley Zebrowski + 15 · CVE-2026-12326 · Published 2026-06-16 · Updated 2026-07-25

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Firefox version 151 Thunderbird version 151

Description Memory safety bugs exist that exhibit evidence of memory corruption. These issues could potentially be exploited to execute arbitrary code.

Recommendations Update Firefox to version 152. Update Thunderbird to version 152.

Fix

DoS

Buffer Overflow

Weakness Enumeration

CWE-119

CWE-825

Related Identifiers

CVE-2026-12326

OPENSUSE-SU-2026:11052-1

OPENSUSE-SU-2026:11373-1

Affected Products

Firefox

Thunderbird

References · 278

• https://cve.org/CVERecord?id=CVE-2026-12326 · Security Note
• https://ubuntu.com/security/CVE-2026-12326 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-12326 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-12326 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:11373-1 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-57 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-57/#CVE-2026-12326 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:11052-1 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-60 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-57 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-60 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-12326 · Security Note
• https://suse.com/security/cve/CVE-2025-9187 · Note
• https://suse.com/security/cve/CVE-2026-8969 · Note
• https://suse.com/security/cve/CVE-2026-0881 · Note