PT-2026-33969 · Mozilla · Thunderbird+1

Crixer · Published 2026-04-21 · Updated 2026-04-27 · CVE-2026-6783

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 150 Thunderbird versions prior to 150

Description An integer overflow occurs due to incorrect boundary conditions in the Audio/Video: Playback component.

Recommendations Update Firefox to version 150. Update Thunderbird to version 150.

Fix

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

CVE-2026-6783

OPENSUSE-SU-2026:10626-1

Affected Products

Firefox

Thunderbird

References · 54

• https://mozilla.org/en-US/security/advisories/mfsa2026-30 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-6783 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:10626-1 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-33 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-30/#CVE-2026-6783 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-33 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-6783 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-6783 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-6783 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-30 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-6783 · Security Note
• https://suse.com/security/cve/CVE-2026-6752 · Note
• https://suse.com/security/cve/CVE-2026-6749 · Note
• https://suse.com/security/cve/CVE-2026-6753 · Note
• https://suse.com/security/cve/CVE-2026-6769 · Note