CVE-2026-40930: LIBPNG: Chunk smuggling in push-mode APNG parser via unconsumed chunk body

Overview

Severity

Medium (CVSS 5.4)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

Exploit Status

Not Exploited

Patch Tuesday

2026-Jun

Released

2026-06-09

Last Updated

2026-06-23

EPSS Score

0.20% (percentile: 10.2%)

Affected Products (3)

Other

• 21422-17084
• 19626-17084
• 21021-17084

Revision History

• 2026-06-09: Information published.
• 2026-06-23: Information published.