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ImageMagick Stack Buffer Overflow Vulnerability in Sixel Encoder

Vulnerability

A stack buffer overflow vulnerability has been identified in ImageMagick versions prior to 7.1.2-16 and 6.9.13-41. This issue arises in the sixel encoder when a memory allocation fails, allowing for writing past the end of a buffer on the stack.

Impact

Exploitation of this vulnerability could lead to a stack buffer overflow, which generally allows for arbitrary code execution or causing a program to crash.

Remediation

Users can upgrade to ImageMagick versions 7.1.2-16 or 6.9.13-41 to address this vulnerability.

Added: Mar 12, 2026, 8:18 PM
Updated: Mar 12, 2026, 8:18 PM

Vulnerability Rating

Custom Algorithm
spread
7.8
impact
1.3
exploitability
2.9
remediation
7.7
relevance
4.1
threat
0.0
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.