ImageMagick: Heap Buffer Over-Read in IPTC encoder

CVE-2026-42326 View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

When writing an IPTC output file a malicious input file could cause an out of bounds read of a single byte.

Basic information

Type: reviewed
Severity: medium
Advisory on GitHub: Open advisory ↗
Repository advisory: Open repository advisory ↗
Source code: Browse source ↗
Published (advisory): 2026-05-18 15:31:56 UTC
Updated: 2026-05-18 15:31:58 UTC
GitHub reviewed: 2026-05-18 15:31:56 UTC

EPSS Score

No EPSS score in this advisory JSON.

CVSS Scores

Base score	Version	Severity	Vector
5.1	3.1	—	`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:L) Some sensitive info could get out, but not a total data dump. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:L) Might cause slowdowns, glitches, or partial disruption—not a full brick.

Identifiers

Type	Value
GHSA	GHSA-7wff-wpr6-vmhm ↗
CVE	CVE-2026-42326 ↗

CWEs

CWE id	Name
CWE-125	Out-of-bounds Read
CWE-191	Integer Underflow (Wrap or Wraparound)

Credits

sukhoon0975 (reporter)

Affected packages (18)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem	Package	Vulnerable range	First patched	Vulnerable functions
nuget	Magick.NET-Q16-AnyCPU	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q16-HDRI-AnyCPU	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q16-HDRI-OpenMP-arm64	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q16-HDRI-OpenMP-x64	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q16-HDRI-arm64	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q16-HDRI-x64	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q16-HDRI-x86	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q16-OpenMP-arm64	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q16-OpenMP-x64	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q16-arm64	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q16-x64	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q16-x86	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q8-AnyCPU	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q8-OpenMP-arm64	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q8-OpenMP-x64	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q8-arm64	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q8-x64	< 14.13.1	14.13.1	—
nuget	Magick.NET-Q8-x86	< 14.13.1	14.13.1	—

References

cvelogic Threat Intelligence