Medium severity5.3NVD Advisory· Published Apr 21, 2026· Updated Apr 22, 2026

CVE-2026-6783

Description

Incorrect boundary conditions, integer overflow in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

Affected products

Mozilla Corporation/Firefox
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
Range: <150.0
Mozilla Corporation/Thunderbird
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
Range: <150.0

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

www.mozilla.org/security/advisories/mfsa2026-30/nvdVendor Advisory
www.mozilla.org/security/advisories/mfsa2026-33/nvdVendor Advisory
bugzilla.mozilla.org/show_bug.cginvdPermissions Required

News mentions

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cvss	0.345
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000