CVE-2026-30937 | ImageMagick has a heap buffer overflow in WriteXWDImage due to CARD32 arithmetic overflow in bytes_per_line calculation

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-16 and 6.9.13-41, a 32-bit unsigned integer overflow in the XWD (X Windows) encoder can cause an undersized heap buffer allocation. When writing a extremely large image an out of bounds heap write can occur. This vulnerability is fixed in 7.1.2-16 and 6.9.13-41.

Published: 2026-03-10 Last update: 2026-03-18 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-30937 is rated Low Risk (27.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.10%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-30937

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.01% 0.10% +0.09%
2 2026-03-10 — 0.01% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-30937

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H 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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.5 4.2 [email protected]
6.1 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H 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:L)
A normal user session is enough; they don’t have to be admin.
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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 4.2 [email protected]

Weakness enumeration for CVE-2026-30937

GitHub Security Advisory for CVE-2026-30937

GHSA-qpg4-j99f-8xcg · Severity: medium · Ecosystem: nuget — ImageMagick has heap buffer overflow in WriteXWDImage due to CARD32 arithmetic overflow in bytes_per_line calculation

OS Trackers for CVE-2026-30937

vendor priority summary link
alpine — CVE-2026-30937: 1 source package rows (imagemagick); 82 state rows across 2 repos (3.23-community, edge-community); fixed 6, open 76. https://security.alpinelinux.org/vuln/CVE-2026-30937
debian not yet assigned CVE-2026-30937 not yet assigned priority: Debian including 1 source packages (imagemagick), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2026-30937
redhat medium — https://access.redhat.com/security/cve/CVE-2026-30937
suse medium CVE-2026-30937 severity moderate: SUSE including 94 source package names (GraphicsMagick, GraphicsMagick-devel, …), 267 product×package rows across 31 product lines (Image SLE-Micro, Image SLE-Micro-Azure, … (31 product lines)): Fixed 144, First Fixed 98, Known Not Affected 25. https://www.suse.com/security/cve/CVE-2026-30937/
ubuntu medium CVE-2026-30937 medium priority: Ubuntu including 1 source packages (imagemagick), 8 status rows across 8 suites (bionic, focal, jammy, noble, questing, trusty, upstream, xenial): needs-triage 8. https://ubuntu.com/security/CVE-2026-30937

Affected software / configurations for CVE-2026-30937

Vendor Product Version Raw CPE
imagemagick imagemagick < 6.9.13-41 cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:*
imagemagick imagemagick >= 7.0.0-0, < 7.1.2-16 cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:*

References for CVE-2026-30937

cvelogic Threat Intelligence