Is CVE-2026-105273 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-105273?

CVE-2026-105273 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-105273

Description

MP4Parser does not adequately validate MP4 box sizes. A malformed box can cause parsing to make no forward progress and repeatedly process the same input.