CVE-2026-56378: ImageMagick before 7.1.2-15 (and 6.x before 6.9.13-40) contains a heap out-of-bounds read in the PCD coder's D

Routine

LOW 3.7REMOTEUPGRADE

CVE-2026-56378 is a low-severity flaw (CVSS 3.7) affecting imagemagick. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ImageMagick before 7.1.2-15 (and 6.x before 6.9.13-40) contains a heap out-of-bounds read in the PCD coder's DecodeImage loop. A crafted PCD file can trigger a one-byte heap out-of-bounds read during image decoding, resulting in denial of service and potential disclosure of an adjacent heap byte.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	3.7 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-125
Published	2026-06-21
Last modified	2026-06-26

Publisher (CNA): VulnCheck · Vendor: imagemagick

Last updated 2026-06-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-21 14:16 UTCPublished CVE record published
2026-06-26 13:41 UTCUpdated Record last modified

imagemagick imagemagick UPGRADE

Affected: >= 6.9.0-0 and < 6.9.13-40 · >= 7.1.2-0 and < 7.1.2-15

Fixed in: 6.9.13-40, 7.1.2-15

Safe to downgrade to: a release before 6.9.0-0

1. Check installed version

apt-cache policy imagemagick || rpm -q imagemagick || imagemagick --version

2. UPGRADE to 6.9.13-40 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade imagemagick

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade imagemagick

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 6.9.0-0 (Debian / Ubuntu)

apt-cache madison imagemagick sudo apt install imagemagick=<VERSION_BEFORE_6.9.0-0> sudo apt-mark hold imagemagick

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list imagemagick sudo dnf downgrade imagemagick-<VERSION_BEFORE_6.9.0-0> sudo dnf versionlock add imagemagick

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-56378?

imagemagick: upgrade to 6.9.13-40, 7.1.2-15. Exact commands for each OS are on this page.

Is CVE-2026-56378 being exploited?

CVE-2026-56378 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-56378 affect?

CVE-2026-56378 affects imagemagick. Severity is low (CVSS 3.7). ImageMagick before 7.1.2-15 (and 6.x before 6.9.13-40) contains a heap out-of-bounds read in the PCD coder's DecodeImage loop. A crafted PCD file can trigger a one-byte heap out-of-bounds read during image decoding, resulting in denial of s

How urgent is CVE-2026-56378?

Priority 26/100. Remotely exploitable, no login, no user action

Software pages

ImageMagick vulnerabilities

Related CVEs

CVE-2026-56371 MEDIUM 5.3 UPGRADE ImageMagick before 7.1.2-15 and 6.9.13-40 contains a memory leak in coders/txt.c when processing TXT files wit
CVE-2026-56368 LOW 3.7 UPGRADE ImageMagick before 7.1.2-15 contains a memory leak vulnerability in multiple coders that write raw pixel data
CVE-2026-56376 LOW 3.7 UPGRADE ImageMagick before 7.1.2-15 and 6.9.13-40 contains a heap use-after-free in the meta coder: when memory alloca
CVE-2026-56374 LOW 3.3 UPGRADE ImageMagick before 7.1.2-19 contains a heap buffer overflow vulnerability in the FTXT encoder due to missing b
CVE-2026-56365 LOW 3.7 UPGRADE ImageMagick before 7.1.2-19 contains a memory leak vulnerability in the PNG encoder when writing MNG images

References

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