How severe is CVE-2026-25799?

CVE-2026-25799 has a CVSS score of 5.3/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2026-25799?

CVE-2026-25799 affects the following packages: Magick.NET-Q16-AnyCPU (NuGet), Magick.NET-Q16-HDRI-AnyCPU (NuGet), Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet), Magick.NET-Q16-HDRI-OpenMP-x64 (NuGet), Magick.NET-Q16-HDRI-arm64 (NuGet), Magick.NET-Q16-HDRI-x64 (NuGet), Magick.NET-Q16-HDRI-x86 (NuGet), Magick.NET-Q16-OpenMP-arm64 (NuGet), and 11 more. Ecosystems affected: NuGet.

How do I fix CVE-2026-25799?

Update Magick.NET-Q16-AnyCPU to 14.10.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-25799 is resolved across your whole dependency graph.

How do I detect CVE-2026-25799 in my NuGet dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Magick.NET-Q16-AnyCPU, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-25799 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2026-25799 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-25799 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-25799?

CVE-2026-25799 has an EPSS (Exploit Prediction Scoring System) score of 0.4%, placing it in the 38th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-25799?

CVE-2026-25799 is classified as CWE-369 (CWE-369). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2026-25799 published, and has it been updated?

CVE-2026-25799 was published on February 24, 2026 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

.NET

.NET NuGet

Not in CISA KEV

MEDIUM severity

CVE-2026-25799 — Magick.NET-Q16-AnyCPU

MEDIUMFix: ImageMagick/ImageMagick@49000e7

CVE-2026-25799 is a medium-severity (CVSS 5.3) CWE-369 vulnerability in Magick.NET-Q16-AnyCPU. A fix is available for Magick.NET-Q16-AnyCPU — see the affected versions and patch details below.

ImageMagick has Division-by-Zero in YUV sampling factor validation, which leads to crash

Also known asGHSA-543g-8grm-9cw6

Published

Feb 24, 2026

Updated

Oct 28, 2026

Affected

19 pkgs

Patched

19 / 19

Exploits

None indexed

Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-25799.

EPSS Exploitation Probability

via FIRST.org ↗

0.4%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs38th percentile — riskier than 38% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

19 pkgs affected

.NETMagick.NET-Q16-AnyCPU.NETMagick.NET-Q16-HDRI-AnyCPU.NETMagick.NET-Q16-HDRI-OpenMP-arm64.NETMagick.NET-Q16-HDRI-OpenMP-x64.NETMagick.NET-Q16-HDRI-arm64.NETMagick.NET-Q16-HDRI-x64.NETMagick.NET-Q16-HDRI-x86.NETMagick.NET-Q16-OpenMP-arm64+11 more

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.

Description

A logic error in YUV sampling factor validation allows an invalid sampling factor to bypass checks and trigger a division-by-zero during image loading, resulting in a reliable denial-of-service.

coders/yuv.c:210:47: runtime error: division by zero
AddressSanitizer:DEADLYSIGNAL
=================================================================
==3543373==ERROR: AddressSanitizer: UNKNOWN SIGNAL on unknown address 0x000000000000 (pc 0x55deeb4d723c bp 0x7fffc28d34d0 sp 0x7fffc28d3320 T0)
    #0 0x55deeb4d723c in ReadYUVImage coders/yuv.c:210
    #1 0x55deeb751dff in ReadImage MagickCore/constitute.c:743
    #2 0x55deeb756374 in ReadImages MagickCore/constitute.c:1082
    #3 0x55deec682375 in CLINoImageOperator MagickWand/operation.c:4959
    #4 0x55deec6887ed in CLIOption MagickWand/operation.c:5473
    #5 0x55deec32843b in ProcessCommandOptions MagickWand/magick-cli.c:653
    #6 0x55deec32b99b in MagickImageCommand MagickWand/magick-cli.c:1392
    #7 0x55deec324d58 in MagickCommandGenesis MagickWand/magick-cli.c:177
    #8 0x55deead82519 in MagickMain utilities/magick.c:162
    #9 0x55deead828be in main utilities/magick.c:193
    #10 0x7fb90807fd8f in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58
    #11 0x7fb90807fe3f in __libc_start_main_impl ../csu/libc-start.c:392
    #12 0x55deead81974 in _start (/data/ylwang/LargeScan/targets/ImageMagick/utilities/magick+0x22fb974)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: UNKNOWN SIGNAL coders/yuv.c:210 in ReadYUVImage
==3543373==ABORTING

Affected Packages

19 total 19 fixed

Ecosystem	Package	Vulnerable range	Fix
.NETNuGet	`Magick.NET-Q16-AnyCPU`	all versions	14.10.3`dotnet add package Magick.NET-Q16-AnyCPU --version 14.10.3`
.NETNuGet	`Magick.NET-Q16-HDRI-AnyCPU`	all versions	14.10.3`dotnet add package Magick.NET-Q16-HDRI-AnyCPU --version 14.10.3`
.NETNuGet	`Magick.NET-Q16-HDRI-OpenMP-arm64`	all versions	14.10.3`dotnet add package Magick.NET-Q16-HDRI-OpenMP-arm64 --version 14.10.3`
.NETNuGet	`Magick.NET-Q16-HDRI-OpenMP-x64`	all versions	14.10.3`dotnet add package Magick.NET-Q16-HDRI-OpenMP-x64 --version 14.10.3`
.NETNuGet	`Magick.NET-Q16-HDRI-arm64`	all versions	14.10.3`dotnet add package Magick.NET-Q16-HDRI-arm64 --version 14.10.3`
.NETNuGet	`Magick.NET-Q16-HDRI-x64`	all versions	14.10.3`dotnet add package Magick.NET-Q16-HDRI-x64 --version 14.10.3`

Affected Products

1 product · 2 configurations

Application

imagemagickimagemagick

≥ 7.0.0-0 && < 7.1.2-15

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Magick.NET-Q16-AnyCPU, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update Magick.NET-Q16-AnyCPU to 14.10.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-25799 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

This MODERATE impact vulnerability in ImageMagick can lead to a denial-of-service. A logic error in YUV sampling factor validation allows an invalid sampling factor to bypass checks, triggering a division-by-zero during image loading. This affects ImageMagick as shipped in Red Hat Enterprise Linux 6 ELS and 7 ELS.

Workaround published by Red Hat

To mitigate this issue, avoid processing untrusted or unknown image files with ImageMagick. Limiting the exposure of ImageMagick to untrusted input sources can reduce the risk of exploitation.

Source: Red Hat security advisory for CVE-2026-25799 (CC BY 4.0)

UbuntuMEDIUM

USN-8127-1Ubuntu USN-8263-1Ubuntu

Frequently Asked Questions

A logic error in YUV sampling factor validation allows an invalid sampling factor to bypass checks and trigger a division-by-zero during image loading, resulting in a reliable denial-of-service. ``` coders/yuv.c:210:47: runtime error: division by zero AddressSanitizer:DEADLYSIGNAL ================================================================= ==3543373==ERROR: AddressSanitizer: UNKNOWN SIGNAL on unknown address 0x000000000000 (pc 0x55deeb4d723c bp 0x7fffc28d34d0 sp 0x7fffc28d3320 T0) #0 0x55deeb4d723c in ReadYUVImage coders/yuv.c:210 #1 0x55deeb751dff in ReadImage MagickCore/consti

O3 Security · Impact-Aware SCA

Is CVE-2026-25799 in your dependencies?

Find it across NuGet, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

5.3/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Raw vector

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

CWE Classification

CWE-369CWE-369

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

Timeline

Disclosed

Feb 24, 2026

Last updated

Oct 28, 2026

Identifiers

CVE-2026-25799

GHSA-543g-8grm-9cw6

References

Advisorygithub.com · CVE 2026 25799.json Advisorygithub.com · GHSA 543g 8grm 9cw6 Advisorynvd.nist.gov · CVE 2026 25799 Webgithub.com · 49000e7298fbfdd759ac2c46f740f40c2e9b7452 Webgithub.com · 14.10.3 Packagegithub.com · ImageMagick

Related vulnerabilities

This CVE is medium severity; 3 of 8 other CVEs affecting Magick.NET-Q16-AnyCPU are rated as high or higher (top: moderate).

GHSA-cvhv-g4rq-3hmwCVE-2026-53466CVE-2026-62363GHSA-56m6-8q75-f2rwGHSA-6jwg-7q3p-5fqmGHSA-6vxp-gfwf-hcr9GHSA-76q6-2p6h-xjqrGHSA-7c7m-fpjw-gwcq

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 28, 2026

CVE-2026-25799 — Magick.NET-Q16-AnyCPU

Exploitation Status

No confirmed exploitation observed yet

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Fixing This On Your OS

Frequently Asked Questions

Is CVE-2026-25799 in your dependencies?