CVE-2026-19970Public exploitNetwork attack vector

Application crash via unchecked bones_num loop

Published Aug 17, 2026 · Updated Aug 19, 2026

Heap-based buffer overflow in Open Asset Import Library Assimp 17c12da allows remote attackers to crash applications via a crafted MDL7 file. In AddBonesToNodeGraph_3DGS_MDL7 in code/AssetLib/MDL/MDLLoader.cpp, the parser trusts pcHeader->bones_num from the file as the loop bound for apcBones and advances past the heap-allocated bone-pointer array. Reachability requires an application to open or process attacker-supplied MDL content; public evidence shows a proof-of-concept and crash behavior, but no confirmed code-execution or in-the-wild exploitation.

CVSS severity6.3
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Open Asset Import Library Assimp 17c12da allows remote attackers to crash applications via a crafted MDL7 file. In AddBonesToNodeGraph_3DGS_MDL7 in code/AssetLib/MDL/MDLLoader.cpp, the parser trusts pcHeader->bones_num from the file as the loop bound for apcBones and advances past the heap-allocated bone-pointer array. Reachability requires an application to open or process attacker-supplied MDL content; public evidence shows a proof-of-concept and crash behavior, but no confirmed code-execution or in-the-wild exploitation.

The record

CVE
CVE-2026-19970
Published
Aug 17, 2026
Updated
Aug 19, 2026
Vendor
Open Asset Import Library
Product
Assimp
Classifications
CWE-122, CWE-119
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=17c12da

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Asset Import Library · Assimpversion=17c12da

Published CVSS scores

6.3Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer

Public exploit references

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Technologies

Your stack

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Your stack

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