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Vulnerability record · CVE-2021-3962 · published 19 November 2021

CVE-2021-3962: Imagemagick use after free vulnerability

Imagemagick · Imagemagick

A flaw was found in ImageMagick where it did not properly sanitize certain input before using it to invoke convert processes. This flaw allows an attacker to create a specially crafted image that leads to a use-after-free vulnerability when processed by ImageMagick. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

7.8 CVSS 3.1 High EPSS 6.0% · top 6.9% CWE-416 · Use after free
7.8CVSS 3.1 base score, v2 6.8
6.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

A flaw was found in ImageMagick where it did not properly sanitize certain input before using it to invoke convert processes. This flaw allows an attacker to create a specially crafted image that leads to a use-after-free vulnerability when processed by ImageMagick. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=2023196 Issue TrackingPatchThird Party Advisory
https://github.com/ImageMagick/ImageMagick/commit/82775af03bbb10a0a1d0e15c0156c75673b4525e PatchThird Party Advisory
https://github.com/ImageMagick/ImageMagick/issues/4446 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2023196 Issue TrackingPatchThird Party Advisory
https://github.com/ImageMagick/ImageMagick/commit/82775af03bbb10a0a1d0e15c0156c75673b4525e PatchThird Party Advisory
https://github.com/ImageMagick/ImageMagick/issues/4446 Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.4CVE-2016-3714ImageMagick coders allow command execution via crafted imageImageMagick before 6.9.3-10 and 7.x before 7.0.1-1 fail to validate input in multiple coders (EPHEMERAL, HTTPS, MVG, MSL, TEXT, SHOW, WIN, PLT), allo…KEVEPSS 97%analysed5.5CVE-2016-3718ImageMagick HTTP/FTP coders allow server-side request forgery via crafted imageImageMagick before 6.9.3-10 and 7.x before 7.0.1-1 mishandles the HTTP and FTP coders, letting a crafted image trigger server-side request forgery. A…KEVEPSS 77%analysed5.5CVE-2016-3715ImageMagick EPHEMERAL coder allows arbitrary file deletionThe EPHEMERAL coder in ImageMagick before 6.9.3-10 and 7.x before 7.0.1-1 lets a crafted image cause deletion of arbitrary files. This is part of the…KEVEPSS 75%analysed10.0CVE-2004-0981Imagemagick vulnerabilityBuffer overflow in the EXIF parsing routine in ImageMagick before 6.1.0 allows remote attackers to execute arbitrary code via a certain image file.EPSS 5.8%9.8CVE-2026-25971Imagemagick out-of-bounds write vulnerabilityImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-15 and 6.9.13-40, Magick fails…EPSS 0.37%9.8CVE-2026-25983Imagemagick use after free vulnerabilityImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-15 and 6.9.13-40, a crafted MS…EPSS 0.52%9.8CVE-2026-25986Imagemagick out-of-bounds write vulnerabilityImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-15 and 6.9.13-40, a heap buffe…EPSS 0.51%9.8CVE-2026-25968Imagemagick stack-based buffer overflow vulnerabilityImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-15 and 6.9.13-40, a stack buff…EPSS 0.47%

Source: NIST National Vulnerability Database (record CVE-2021-3962), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.