Local process crash via undersized vertex allocation
Published Aug 30, 2026 · Updated Aug 30, 2026
Heap-based buffer overflow in Assimp 6.0.0 through 6.0.2 allows local users to crash importing applications via a malformed MD5 mesh. MakeDataUnique sizes the vertex array to three times the face count but begins its append index at the original vertex count, so unreferenced or excess declared vertices make a duplicate write exceed the heap allocation. Triggering requires a local user to cause a vulnerable application to import the malformed file; the demonstrated consequence is a process crash.
Summary
What happened
Heap-based buffer overflow in Assimp 6.0.0 through 6.0.2 allows local users to crash importing applications via a malformed MD5 mesh. MakeDataUnique sizes the vertex array to three times the face count but begins its append index at the original vertex count, so unreferenced or excess declared vertices make a duplicate write exceed the heap allocation. Triggering requires a local user to cause a vulnerable application to import the malformed file; the demonstrated consequence is a process crash.
The record
- CVE
- CVE-2026-82591
- Published
- Aug 30, 2026
- Updated
- Aug 30, 2026
- Vendor
- Open Asset Import Library
- Product
- Assimp
- Classifications
- CWE-122, CWE-119
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 30, 2026CVE publishedPublication date reported by the CVE source.
- Aug 30, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=6.0.0
- Affected versionversion=6.0.1
- Affected versionversion=6.0.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo