Heap-Based Buffer Overflow in Assimp's Half-Life 1 MDL Loader
CVE-2026-10231

4.8MEDIUM

Key Information:

Vendor

Assimp

Status
Assimp
Vendor
CVE Published:
1 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-10231?

A security flaw has been identified in Assimp's Half-Life 1 MDL Loader, specifically within the HL1MDLLoader::extract_anim_value function in HL1MDLLoader.cpp. This vulnerability allows for a heap-based buffer overflow when the argument 'num.total' is manipulated. Notably, the exploit must be executed from a local position, making it particularly concerning for users with local access. The exploit has been made public, raising urgency for affected users to mitigate any potential risks.

Affected Version(s)

Assimp 6.0.0

Assimp 6.0.1

Assimp 6.0.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-10231 - Proof of Concept

References

https://vuldb.com/vuln/367510
vdb-entrytechnical-description
https://vuldb.com/vuln/367510/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-10231
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

TYGLS (VulDB User)
VulDB CNA Team
.