CVE-2026-40310

Description

ImageMagick is free and open-source software used for editing and manipulating digital images. Versions below both 7.1.2-19 and 6.9.13-44, contain a heap out-of-bounds write in the JP2 encoder with when a user specifies an invalid sampling index. This issue has been fixed in versions 6.9.13-44 and 7.1.2-19.

How to fix CVE-2026-40310

To remediate CVE-2026-40310, upgrade the affected package to a fixed version below.

• —upgrade to 8:6.9.11.60+dfsg-1.3+deb11u12 or later
• —upgrade to 14.12.0 or later
• —upgrade to 14.12.0 or later
• —upgrade to 14.12.0 or later
• —upgrade to 14.12.0 or later
• —upgrade to 14.12.0 or later
• —upgrade to 14.12.0 or later
• —upgrade to 14.12.0 or later
• —upgrade to 14.12.0 or later
• —upgrade to 14.12.0 or later
• —upgrade to 14.12.0 or later
• —upgrade to 14.12.0 or later
• —upgrade to 14.12.0 or later
• —upgrade to 14.12.0 or later
• —upgrade to 14.12.0 or later
• —upgrade to 14.12.0 or later

Is CVE-2026-40310 being exploited?

Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.

Affected packages (17)

• from 0, < 8:6.9.11.60+dfsg-1.3+deb11u12
• from 0, < 14.12.0
• from 0, < 14.12.0
• from 0, < 14.12.0
• from 0, < 14.12.0
• from 0, < 14.12.0
• from 0, < 14.12.0
• from 0, < 14.12.0
• from 0, < 14.12.0
• from 0, < 14.12.0

CVSS scores

References (7)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-40310
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2026-40310
• PATCHgithub.com/ImageMagick/ImageMagick
• WEBgithub.com/dlemstra/Magick.NET/releases/tag/14.12.0