CVE-2025-6119: Open Asset Import Library Assimp · Use After Free
Affects Open Asset Import Library AssimpSource CVE Database V5
Public exploit available · CVSS 4.8 Medium.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:PExploitation evidence
Disclosed: evidence found.
CVE published 16 Jun 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
GitHubassimp/assimppkg:github/assimp/assimpOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade Assimp to a version beyond 5.4.3 once the vendor releases a patch addressing this vulnerability. Monitor the official Assimp repository and security advisories for updates.
Implement strict access controls and monitoring on systems where Assimp is installed to prevent unauthorized local access, as exploitation requires local presence.
Employ application whitelisting and sandboxing techniques for software components that use Assimp to limit the impact of potential exploitation.
Conduct regular code audits and fuzz testing on custom integrations of Assimp to identify and remediate similar memory management issues proactively.
Restrict the processing of untrusted or unauthenticated BVH files, especially from external or user-generated sources, to reduce the attack surface.
Enhance endpoint detection and response (EDR) capabilities to detect anomalous behaviors indicative of exploitation attempts, such as unexpected crashes or memory access violations.
Educate developers and system administrators about the risks associated with use-after-free vulnerabilities and the importance of timely patching and secure coding practices.
Description
A vulnerability classified as critical has been found in Open Asset Import Library Assimp up to 5.4.3. Affected is the function Assimp::BVHLoader::ReadNodeChannels in the library assimp/code/AssetLib/BVH/BVHLoader.cpp. The manipulation of the argument pNode leads to use after free. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used. The project decided to collect all Fuzzer bugs in a main-issue to address them in the future.