Is CVE-2026-120458 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-120458?

CVE-2026-120458 has a CVSS v3 severity of MEDIUM (5.5).

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CVE-2026-120458

Description

Kvazaar through 2.3.2 contains an infinite loop vulnerability in read_header() in src/encmain.c that allows attackers to hang the command-line encoder by supplying a truncated Y4M header. Attackers can provide a crafted .y4m file lacking a terminating newline, causing unchecked EOF reads that hang the process indefinitely while consuming a full CPU core.