---
id: "CVE-2026-119722"
kind: "vulnerability"
aliases: ["CVE-2026-119722"]
title: "Blender: crafted .blend file overruns heap memory, risking code execution"
severity: "high"
cvss: 8.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["3d-artists", "blender", "desktop", "package"]
not_affected_if: ["fixed-version", "no-untrusted-blend-files"]
published_at: "2026-10-30T16:17:55+00:00"
first_seen_at: "2026-10-30T16:31:27+00:00"
updated_at: "2026-10-30T16:31:49+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119722", "first_seen_at": "2026-10-30T16:31:27+00:00"}]
---

# Blender: crafted .blend file overruns heap memory, risking code execution

Blender before 4.5.15 and 5.x before 5.2.3 mishandles size checks when reading .blend files, so a crafted file can read and write past heap buffers. An attacker who gets a user to open the file can crash Blender or possibly run code.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `blender --version` and compare the version against the fixed ranges.
- List the Blender versions installed on workstations and build machines.

## Fix

- Blender `4.5.15` for the 4.5 line
- Blender `5.2.3` for the 5.x line

## Timeline

- 2026-10-30T16:31:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-119722

## From the sources

Blender before 4.5.15 and 5.x before 5.2.3 contains a heap out-of-bounds access vulnerability in read_struct() that skips size validation when a .blend file's SDNA struct layout compares equal. Attackers can supply a crafted .blend file with short blocks so field reads, writes, and pointer dereferences overrun heap memory, causing crashes or code execution.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_