Cyber Resilience

CVE-2026-56378

MediumPublic PoC

Published: 21 June 2026

Published
21 June 2026
Modified
26 June 2026
KEV Added
—
Patch
—
CVSS Score v4 6.3 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0022 12.8th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2026-56378 is a medium-severity Out-of-bounds Read (CWE-125) vulnerability in Imagemagick Imagemagick. Its CVSS base score is 6.3 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 12.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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…

more

of an adjacent heap byte.

CWE(s)
CWE-125

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1204.003 Malicious Image Execution
Adversaries may rely on a user running a malicious image to facilitate execution.
attack.mitre.org →
Why these techniques?

Heap OOB read in image decoder enables exploitation via malicious PCD images processed by public apps or opened by users.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

Affected Assets

imagemagick
imagemagick
6.9.0-0 — 6.9.13-40 · 7.1.2-0 — 7.1.2-15

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References