# CVE-2026-55577: ImageMagick: Heap Buffer Overflow in ImageMagick MVG decoder

> A heap buffer overflow in the MVG decoder allows attackers to execute arbitrary code or cause denial of service via crafted images.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 Jul 2026
- **Updated:** 1 Jul 2026
- **Also known as:** DEBIAN-CVE-2026-55577, ECHO-f87c-5fbc-0b6a, GHSA-wx47-rm3x-jx6p, JLSEC-2026-1037, MINI-27hq-hmgh-pch2, UBUNTU-CVE-2026-55577

## What is CVE-2026-55577?

CVE-2026-55577 is a medium-severity memory corruption vulnerability in Imagemagick Imagemagick, published on 1 Jul 2026. An attacker can exploit it over the internet without logging in, 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 6.9.13-51 and 7.1.2-26, a heap buffer overflow occurs in the MVG decoder that could result in an out of bounds write when processing a crafted image. This issue has been fixed in versions 6.9.13-51 and 7.1.2-26.

Weakness: CWE-787 (Out-of-bounds Write), CWE-755 (Improper Handling of Exceptional Conditions), CWE-754 (Improper Check for Unusual or Exceptional Conditions)

## Which versions are affected by CVE-2026-55577?

It affects 1 product.


Products: Imagemagick Imagemagick.

## How do I fix CVE-2026-55577?

Upgrade to a fixed version.

## Is CVE-2026-55577 being exploited?

There is no known exploitation of CVE-2026-55577 in the wild and no public exploit code.

## Other vulnerabilities in Imagemagick Imagemagick

- [CVE-2019-19952](https://insights.sbomify.com/CVE-2019-19952/): Use after free in n/a (critical 9.8)
- [CVE-2018-16328](https://insights.sbomify.com/CVE-2018-16328/): Null dereference in n/a (critical 9.8)
- [CVE-2018-16329](https://insights.sbomify.com/CVE-2018-16329/): Null dereference in n/a (critical 9.8)
- [CVE-2017-18210](https://insights.sbomify.com/CVE-2017-18210/): Null dereference in n/a (critical 9.8)
- [CVE-2017-14138](https://insights.sbomify.com/CVE-2017-14138/): Denial of service in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-55577 and fix it if it is affected.

What it is: CVE-2026-55577 is a medium-severity memory corruption vulnerability in Imagemagick Imagemagick, published on 1 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-55577 in the wild and no public exploit code.

Affected product: Imagemagick Imagemagick. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2026-55577/ (Markdown: https://insights.sbomify.com/CVE-2026-55577/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-55577
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-55577
- OSV: https://osv.dev/vulnerability/CVE-2026-55577

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-55577/
Summaries are generated and may contain mistakes; the official description above is the record.