# CVE-2026-19999: Memory corruption in Assimp

> A buffer overflow in Assimp's MDL7 parser allows remote attackers to execute arbitrary code or cause denial of service via crafted 3D model files.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 17 Aug 2026
- **Updated:** 19 Aug 2026
- **Also known as:** DEBIAN-CVE-2026-19999, GHSA-57fh-7xg4-7jjw, OESA-2026-4141, OESA-2026-4142, OESA-2026-4143, OESA-2026-4347, UBUNTU-CVE-2026-19999

## What is CVE-2026-19999?

CVE-2026-19999 is a medium-severity memory corruption vulnerability in Open Asset Import Library Assimp Assimp, published on 17 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A security vulnerability has been detected in Open Asset Import Library Assimp Assimp 17c12da. The affected element is the function Assimp::MDLImporter::ParseBoneTrafoKeys_3DGS_MDL7 of the file code/AssetLib/MDL/MDLLoader.cpp of the component 3DGS MDL7 Bone Transformation Key Parser. The manipulation of the argument transmatrix_count/pcBoneTransforms leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The identifier of the patch is 50d767984e78d51b53e2020fdf0967fd624bc377. It is recommended to apply a patch to fix this issue.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2026-19999?


## How do I fix CVE-2026-19999?

Apply the vendor's patch.

## Is CVE-2026-19999 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19999 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-19999 and fix it if it is affected.

What it is: CVE-2026-19999 is a medium-severity memory corruption vulnerability in Open Asset Import Library Assimp Assimp, published on 17 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19999 exists.

Affected product: Open Asset Import Library Assimp Assimp. 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-2026-19999/ (Markdown: https://insights.sbomify.com/CVE-2026-19999/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-19999
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-19999
- OSV: https://osv.dev/vulnerability/CVE-2026-19999

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-19999/
Summaries are generated and may contain mistakes; the official description above is the record.