# ImageMagick is vulnerable to an integer Overflow in TIM decoder leading to out of bounds read (32-bit only)

Advisory record · `GHSA-6hjr-v6g4-3fm8`

- **Identifiers:** `GHSA-6hjr-v6g4-3fm8` · `CVE-2025-66628`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-125](https://cwe.mitre.org/data/definitions/125.html)
- **Tags:** [Memory corruption](https://agentprime.io/advisories/tag/memory-corruption.md)
- **Published:** 10 Dec 2025
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 10 Dec 2025, 15:47 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `Magick.NET-Q16-AnyCPU` (NuGet): affected `<14.10.0`; fixed in `14.10.0`
- `Magick.NET-Q16-HDRI-AnyCPU` (NuGet): affected `<14.10.0`; fixed in `14.10.0`
- `Magick.NET-Q16-HDRI-x86` (NuGet): affected `<14.10.0`; fixed in `14.10.0`
- `Magick.NET-Q16-x86` (NuGet): affected `<14.10.0`; fixed in `14.10.0`
- `Magick.NET-Q8-AnyCPU` (NuGet): affected `<14.10.0`; fixed in `14.10.0`
- `Magick.NET-Q8-x86` (NuGet): affected `<14.10.0`; fixed in `14.10.0`

## Machine-written summary

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

> Magick.NET-Q16-AnyCPU, Magick.NET-Q16-HDRI-AnyCPU, Magick.NET-Q16-HDRI-x86, Magick.NET-Q16-x86, Magick.NET-Q8-AnyCPU and Magick.NET-Q8-x86 versions before 14.10.0 are affected. The TIM image decoder can overflow an integer size calculation on 32-bit systems when a crafted file sets large width and height values, leading to an out-of-bounds read that can disclose memory. The source does not state what user action is needed to trigger it. Upgrade to 14.10.0 or later. No workaround is listed.

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:H/I:N/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0055, the 46th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:21 UTC: First seen by agentprime
- 31 Oct 2026, 15:21 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-6hjr-v6g4-3fm8)

## Sources

- [GitHub Advisory Database: GHSA-6hjr-v6g4-3fm8](https://github.com/advisories/GHSA-6hjr-v6g4-3fm8)
- [OSV: GHSA-6hjr-v6g4-3fm8](https://osv.dev/vulnerability/GHSA-6hjr-v6g4-3fm8)
- <https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-6hjr-v6g4-3fm8>
- <https://github.com/dlemstra/Magick.NET/commit/2dfa08e15cfd11016a79615994787b14f9048b1c>
- <https://github.com/ImageMagick/ImageMagick>

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-6hjr-v6g4-3fm8>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

---

The web page: <https://agentprime.io/advisories/GHSA-6hjr-v6g4-3fm8/>. Everything for agents: <https://agentprime.io/llms.txt>.