# CVE-2026-27799: ImageMagick has a heap Buffer Over-read in its DJVU image format handler > An attacker can trigger a heap buffer over-read in ImageMagick's DJVU handler via integer truncation, potentially causing crashes or leaking memory. - **Severity:** Medium 4.0 (`CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Local or same network only - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 25 Feb 2026 - **Updated:** 26 Feb 2026 - **Also known as:** DEBIAN-CVE-2026-27799, ECHO-352a-f5fb-acf4, GHSA-r99p-5442-q2x2, JLSEC-2026-971, MINI-7986-787v-wfc3, UBUNTU-CVE-2026-27799 ## What is CVE-2026-27799? CVE-2026-27799 is a medium-severity vulnerability in Imagemagick Imagemagick, published on 25 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim. ### Official description ImageMagick 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 buffer over-read vulnerability exists in the DJVU image format handler. The vulnerability occurs due to integer truncation when calculating the stride (row size) for pixel buffer allocation. The stride calculation overflows a 32-bit signed integer, resulting in an out-of-bounds memory reads. Versions 7.1.2-15 and 6.9.13-40 contain a patch. Weakness: CWE-126 (Buffer Over-read), CWE-122 (Heap-based Buffer Overflow) ## Which versions are affected by CVE-2026-27799? 38 open source packages ship an affected version, including Magick.NET-Q16-AnyCPU, Magick.NET-Q16-HDRI-AnyCPU and Magick.NET-Q16-HDRI-OpenMP-arm64. It affects 2 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `Magick.NET-Q16-AnyCPU` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-AnyCPU` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-HDRI-AnyCPU` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-HDRI-AnyCPU` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-HDRI-OpenMP-arm64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-HDRI-OpenMP-arm64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-HDRI-OpenMP-x64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-HDRI-OpenMP-x64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-HDRI-arm64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-HDRI-arm64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-HDRI-x64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-HDRI-x64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-HDRI-x86` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-HDRI-x86` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-OpenMP-arm64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-OpenMP-arm64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-OpenMP-x64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-OpenMP-x64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-OpenMP-x86` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-OpenMP-x86` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-arm64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-arm64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-x64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-x64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-x86` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q16-x86` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q8-AnyCPU` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q8-AnyCPU` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q8-OpenMP-arm64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q8-OpenMP-arm64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q8-OpenMP-x64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q8-OpenMP-x64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q8-arm64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q8-arm64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q8-x64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q8-x64` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q8-x86` | NuGet | All versions | 14.10.3 | | `Magick.NET-Q8-x86` | NuGet | All versions | 14.10.3 | Products: Dlemstra Magick.net, Imagemagick Imagemagick. ## How do I fix CVE-2026-27799? Upgrade Magick.NET-Q16-AnyCPU to 14.10.3 or later. ## Is CVE-2026-27799 being exploited? There is no known exploitation of CVE-2026-27799 in the wild and no public exploit code. ## Other vulnerabilities in Imagemagick Imagemagick - [CVE-2026-24485](https://insights.sbomify.com/CVE-2026-24485/): ImageMagick: Infinite loop vulnerability when parsing a PCD file (high 7.5) - [CVE-2026-23952](https://insights.sbomify.com/CVE-2026-23952/): ImageMagick has a NULL pointer dereference in MSL parser via tag before image load (medium 6.5) - [CVE-2026-24484](https://insights.sbomify.com/CVE-2026-24484/): ImageMagick: Converting multi-layer nested MVG to SVG can cause DoS (medium 5.3) - [CVE-2026-25637](https://insights.sbomify.com/CVE-2026-25637/): ImageMagick: Possible memory leak in ASHLAR encoder (medium 5.3) - [CVE-2026-25576](https://insights.sbomify.com/CVE-2026-25576/): ImageMagick: Out of bounds read in multiple coders read raw pixel data (medium 5.1) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2026-27799 and fix it if it is affected. What it is: CVE-2026-27799 is a medium-severity vulnerability in Imagemagick Imagemagick, published on 25 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2026-27799 in the wild and no public exploit code. Affected packages and fixed versions: - Magick.NET-Q16-AnyCPU (NuGet): affected all versions; fixed in 14.10.3 - Magick.NET-Q16-AnyCPU (NuGet): affected all versions; fixed in 14.10.3 - Magick.NET-Q16-HDRI-AnyCPU (NuGet): affected all versions; fixed in 14.10.3 - Magick.NET-Q16-HDRI-AnyCPU (NuGet): affected all versions; fixed in 14.10.3 - Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet): affected all versions; fixed in 14.10.3 - Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet): affected all versions; fixed in 14.10.3 - Magick.NET-Q16-HDRI-OpenMP-x64 (NuGet): affected all versions; fixed in 14.10.3 - Magick.NET-Q16-HDRI-OpenMP-x64 (NuGet): affected all versions; fixed in 14.10.3 - Magick.NET-Q16-HDRI-arm64 (NuGet): affected all versions; fixed in 14.10.3 - Magick.NET-Q16-HDRI-arm64 (NuGet): affected all versions; fixed in 14.10.3 - Magick.NET-Q16-HDRI-x64 (NuGet): affected all versions; fixed in 14.10.3 - Magick.NET-Q16-HDRI-x64 (NuGet): affected all versions; fixed in 14.10.3 Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2026-27799/ (Markdown: https://insights.sbomify.com/CVE-2026-27799/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2026-27799 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-27799 - OSV: https://osv.dev/vulnerability/CVE-2026-27799 --- From sbomify Insights: https://insights.sbomify.com/CVE-2026-27799/ Summaries are generated and may contain mistakes; the official description above is the record.