Is CVE-2026-32739 actively exploited?

No active exploitation of CVE-2026-32739 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-32739 be exploited remotely?

Yes. CVE-2026-32739 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-32739?

CVE-2026-32739 has a CVSS score of 6.5 (MEDIUM).

HOME VULNERABILITIESCVE-2026-32739

MEDIUM

CVE-2026-32739

CWE-835Published: May 19, 2026· Updated: May 20, 2026

6.5

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:14.8th

Official Description

libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and below, a crafted 800-byte HEIF sequence file causes an infinite loop in Box_stts::get_sample_duration(), consuming 100% CPU indefinitely with zero progress, leading to DoS. The loop has no iteration limit or timeout and is triggered during file open (parsing) - before any user interaction or image decoding. The process stays alive (no crash, no error logged), making it invisible to crash-based monitoring. This issue has been fixed in version 1.22.0.

NVD Source

Technical Analysis

CVE-2026-32739 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.