What is CVE-2026-46521?

CVE-2026-46521 is a medium-severity vulnerability, classified under Incorrect Calculation of Buffer Size. CVSS score: 5.5/10. Published 2026-06-10.

How severe is CVE-2026-46521?

Medium severity. CVSS v3 base score is 5.5 out of 10.

CVE-2026-46521

CVE-2026-46521

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-48 and 7.1.2-23, when using LZMA compression in the MIFF encoder an out of bounds write can occur due to a missing chec…

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Weakness classification (CWE)

CWE-131 — Incorrect Calculation of Buffer Size
CWE-252
CWE-787 — Out-of-bounds Write
CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

security-advisories@github.com

Frequently asked questions

What is CVE-2026-46521?: CVE-2026-46521 is a medium-severity vulnerability, classified under Incorrect Calculation of Buffer Size. CVSS score: 5.5/10. Published 2026-06-10.
How severe is CVE-2026-46521?: Medium severity. CVSS v3 base score is 5.5 out of 10.