OSV-2026-521: UNKNOWN READ in unsigned long Assimp::StreamReader<true, true>::Get<unsigned long>
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=499121788 ``` Crash type: UNKNOWN READ Crash state: unsigned long Assimp::StreamReader<true, true>::Get<unsigned long> bool Assimp::Blender::Structure::ResolvePointer<std::__1::shared_ptr, Assimp::Bl bool Assimp::Blender::Structure::ReadFieldPtr<2, Assimp::Blender::vector, std::_ ```
AI Analysis
Technical Summary
The vulnerability OSV-2026-521 in assimp versions 6.0.3, 6.0.4, and 6.0.5 is an UNKNOWN READ crash detected by OSS-Fuzz in the template function Assimp::StreamReader<true, true>::Get<unsigned long>. The crash trace indicates issues in pointer resolution and field reading within Blender structure parsing code paths. This suggests a potential memory safety issue that could lead to application crashes when processing certain inputs. No further exploitation details or impact specifics are available.
Potential Impact
The vulnerability causes an UNKNOWN READ crash in the assimp library, which may lead to denial of service due to application crashes when parsing Blender structures. There is no evidence of known exploits in the wild or further impact such as code execution disclosed in the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided at this time. Users should monitor the assimp project and OSS-Fuzz reports for updates and apply patches once available.
OSV-2026-521: UNKNOWN READ in unsigned long Assimp::StreamReader<true, true>::Get<unsigned long>
Description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=499121788 ``` Crash type: UNKNOWN READ Crash state: unsigned long Assimp::StreamReader<true, true>::Get<unsigned long> bool Assimp::Blender::Structure::ResolvePointer<std::__1::shared_ptr, Assimp::Bl bool Assimp::Blender::Structure::ReadFieldPtr<2, Assimp::Blender::vector, std::_ ```
Affected software
pkg:generic/assimpRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability OSV-2026-521 in assimp versions 6.0.3, 6.0.4, and 6.0.5 is an UNKNOWN READ crash detected by OSS-Fuzz in the template function Assimp::StreamReader<true, true>::Get<unsigned long>. The crash trace indicates issues in pointer resolution and field reading within Blender structure parsing code paths. This suggests a potential memory safety issue that could lead to application crashes when processing certain inputs. No further exploitation details or impact specifics are available.
Potential Impact
The vulnerability causes an UNKNOWN READ crash in the assimp library, which may lead to denial of service due to application crashes when parsing Blender structures. There is no evidence of known exploits in the wild or further impact such as code execution disclosed in the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided at this time. Users should monitor the assimp project and OSS-Fuzz reports for updates and apply patches once available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- OSV-2026-521
- Osv Schema Version
- 1.7.5
- Aliases
- []
- Ecosystems
- ["OSS-Fuzz"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a483ca927e9c79719d8079f
Added to database: 07/03/2026, 22:50:17 UTC
Last enriched: 07/03/2026, 22:57:21 UTC
Last updated: 07/13/2026, 16:25:42 UTC
Views: 10
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