PT-2026-30824 · Mozilla · Thunderbird+1

Inseo An · Published 2026-04-07 · Updated 2026-04-19 · CVE-2026-5733

Positive Technologies (AI Summary)

CVSS v2.0

10

High

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Mozilla Firefox versions prior to 149.0.2 Thunderbird versions prior to 149.0.2

Description A buffer overflow flaw exists in the WebGPU component of Mozilla Firefox and Thunderbird. Successful exploitation could allow a remote attacker to execute arbitrary code.

Recommendations Update Mozilla Firefox to version 149.0.2 or later. Update Thunderbird to version 149.0.2 or later.

Exploit

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

BDU:2026-04850

CVE-2026-5733

OPENSUSE-SU-2026:10511-1

Affected Products

Firefox

Thunderbird

References · 20

• 🔥 https://github.com/Lechansky/CVE-2026-5733 · Exploit
• https://osv.dev/vulnerability/openSUSE-SU-2026:10511-1 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-25/#CVE-2026-5733 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-28 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-5733 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-25 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-28 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-5733 · Security Note
• https://bdu.fstec.ru/vul/2026-04850 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-5733 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-5733 · Security Note
• https://mozilla.org/security/advisories/mfsa2026-25 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-5733 · Security Note
• https://suse.com/security/cve/CVE-2026-5735 · Note
• https://bugzilla.mozilla.org/show_bug.cgi?id=2022554 · Note