# ImageMagick has a Stack Overflow in DestroyXMLTree()

Advisory record · `GHSA-fwvm-ggf6-2p4x`

- **Identifiers:** `GHSA-fwvm-ggf6-2p4x` · `CVE-2026-33908`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-674](https://cwe.mitre.org/data/definitions/674.html) · [CWE-776](https://cwe.mitre.org/data/definitions/776.html)
- **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md)
- **Published:** 14 Apr 2026
- **Updated:** 21 Apr 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 14 Apr 2026, 00:06 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `Magick.NET-Q16-AnyCPU` (NuGet): affected `<14.12.0`; fixed in `14.12.0`
- `Magick.NET-Q16-HDRI-AnyCPU` (NuGet): affected `<14.12.0`; fixed in `14.12.0`
- `Magick.NET-Q16-HDRI-OpenMP-arm64` (NuGet): affected `<14.12.0`; fixed in `14.12.0`
- `Magick.NET-Q16-HDRI-arm64` (NuGet): affected `<14.12.0`; fixed in `14.12.0`
- `Magick.NET-Q16-HDRI-x64` (NuGet): affected `<14.12.0`; fixed in `14.12.0`
- `Magick.NET-Q16-HDRI-x86` (NuGet): affected `<14.12.0`; fixed in `14.12.0`
- `Magick.NET-Q16-OpenMP-arm64` (NuGet): affected `<14.12.0`; fixed in `14.12.0`
- `Magick.NET-Q16-OpenMP-x64` (NuGet): affected `<14.12.0`; fixed in `14.12.0`
- `Magick.NET-Q16-arm64` (NuGet): affected `<14.12.0`; fixed in `14.12.0`
- `Magick.NET-Q16-x64` (NuGet): affected `<14.12.0`; fixed in `14.12.0`
- `Magick.NET-Q16-x86` (NuGet): affected `<14.12.0`; fixed in `14.12.0`
- `Magick.NET-Q8-AnyCPU` (NuGet): affected `<14.12.0`; fixed in `14.12.0`
- `Magick.NET-Q8-OpenMP-arm64` (NuGet): affected `<14.12.0`; fixed in `14.12.0`
- `Magick.NET-Q8-OpenMP-x64` (NuGet): affected `<14.12.0`; fixed in `14.12.0`
- `Magick.NET-Q8-arm64` (NuGet): affected `<14.12.0`; fixed in `14.12.0`
- `Magick.NET-Q8-x64` (NuGet): affected `<14.12.0`; fixed in `14.12.0`
- `Magick.NET-Q8-x86` (NuGet): affected `<14.12.0`; fixed in `14.12.0`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Magick.NET-Q16 and related Magick.NET-Q16-HDRI packages (all builds) before 14.12.0 are vulnerable to a stack overflow in the DestroyXMLTree function, which frees XML trees recursively with no depth limit. An attacker who can get the application to process a crafted XML file with deeply nested structures can exhaust the stack and cause a denial of service. Upgrade to version 14.12.0 or later.

Written 9 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0051, the 43rd percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:22 UTC: First seen by agentprime
- 31 Oct 2026, 15:22 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-fwvm-ggf6-2p4x)

## Sources

- [GitHub Advisory Database: GHSA-fwvm-ggf6-2p4x](https://github.com/advisories/GHSA-fwvm-ggf6-2p4x)
- [OSV: GHSA-fwvm-ggf6-2p4x](https://osv.dev/vulnerability/GHSA-fwvm-ggf6-2p4x)
- <https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-fwvm-ggf6-2p4x>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-33908>
- <https://github.com/ImageMagick/ImageMagick/commit/ccdc01180276aa2cb3d4a32a611aa4f417061cd8>
- <https://github.com/ImageMagick/ImageMagick>
- <https://github.com/ImageMagick/ImageMagick/releases/tag/7.1.2-19>
- <https://github.com/dlemstra/Magick.NET/releases/tag/14.12.0>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-fwvm-ggf6-2p4x>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-fwvm-ggf6-2p4x/>. Everything for agents: <https://agentprime.io/llms.txt>.