# CVE-2026-82591 — Open Asset Import Library Assimp

> As of 2026-08-31, CVE-2026-82591 is a MEDIUM-severity vulnerability in Open Asset Import Library Assimp, CVSS v3.1 5.3, EPSS 0.1% (2.4th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-82591 as of 2026-08-31; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-08-31

## What is CVE-2026-82591?

A security vulnerability has been detected in Open Asset Import Library Assimp up to 6.0.2. The impacted element is the function MD5Importer::MakeDataUnique of the file code/AssetLib/MD5/MD5Loader.cpp. The manipulation of the argument iNewIndex leads to heap-based buffer overflow. The attack can only be performed from a local environment. The identifier of the patch is bf9dabb617c46e5133dac65cca6bff177917afcb. Applying a patch is the recommended action to fix this issue.

The record classifies CVE-2026-82591 under weakness classes [CWE-122](https://intel.threadlinqs.com/cwe/CWE-122), [CWE-119](https://intel.threadlinqs.com/cwe/CWE-119). Its CVSS v3 base vector states that the flaw requires local access to the host, needs low-privilege credentials, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 36 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 5.3 — MEDIUM (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C`)
- **CVSS v4.0 base score:** 4.8 (`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:X`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 2.4% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-30, last modified 2026-08-31

## Is CVE-2026-82591 being exploited?

It currently carries a trending score of 30 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **Open Asset Import Library**: Assimp

## How to fix CVE-2026-82591

No vendor patch reference has been recorded for CVE-2026-82591 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-82591

No threat campaign in the Threadlinqs corpus currently references CVE-2026-82591, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-08-31.

**Vendor advisory and patch**

- [github.com — issue tracking](https://github.com/assimp/assimp/pull/6718)
- [github.com — patch](https://github.com/assimp/assimp/commit/bf9dabb617c46e5133dac65cca6bff177917afcb)

**Technical analysis**

- [vuldb.com — vdb entry](https://vuldb.com/vuln/397086)

**Third-party advisory**

- [vuldb.com — signature](https://vuldb.com/vuln/397086/cti)
- [vuldb.com — third party advisory](https://vuldb.com/cve/CVE-2026-82591)
- [vuldb.com — third party advisory (892413)](https://vuldb.com/submit/892413)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-82591
Full detection coverage and IOCs for threats exploiting CVE-2026-82591 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp