CVE-2026-19967
Received Received - Intake

Heap-based Buffer Overflow in Open Asset Import Library Assimp

Vulnerability report for CVE-2026-19967, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-08-17

Last updated on: 2026-08-17

Assigner: VulDB

Description

A security flaw has been discovered in Open Asset Import Library Assimp 17c12da. Impacted is the function Assimp::Compression::decompressBlock of the file code/Common/Compression.cpp of the component File Parser. Performing a manipulation results in heap-based buffer overflow. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

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Meta Information

Published
2026-08-17
Last Modified
2026-08-17
Generated
2026-08-17
AI Q&A
2026-08-17
EPSS Evaluated
N/A
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
assimp open_asset_import_library 17c12da

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Attack-Flow Graph

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Executive Summary

This vulnerability is a heap-based buffer overflow in the Open Asset Import Library (Assimp) version 17c12da. It occurs in the Assimp::Compression::decompressBlock function when processing compressed data. The flaw allows attackers to trigger a buffer overflow by manipulating input data, potentially leading to memory corruption or crashes.

Detection Guidance

To detect this vulnerability, use tools like AddressSanitizer or Valgrind to monitor for heap-buffer-overflows during file parsing with Assimp. Check for crashes in the Assimp::Compression::decompressBlock function when processing compressed files. Monitor logs for zlib inflate errors or memory access violations.

Impact Analysis

This vulnerability may allow remote attackers to execute arbitrary code or cause denial-of-service conditions on systems using the affected Assimp library. Since the exploit is publicly available, unpatched systems are at risk of attacks leveraging this flaw.

Mitigation Strategies

Immediately update Assimp to the latest patched version if available. Avoid processing untrusted files with Assimp until patched. Implement input validation for compressed data to ensure declared lengths match actual data. Disable or restrict file parsing features using Assimp in high-risk environments.

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