在FOSSY 2026会议上，Software Freedom Conservancy（SFC）成员Bradley Kühn、Karen Sandler和Denver Gingerich发表演讲，讨论了Bambu Lab公司3D打印机软件涉嫌违反AGPLv3和GPLv2许可证的问题 1。数据显示，Bambu Lab在2025年控制了500至3000美元价位3D打印机市场38%至48%的份额 1。SFC正通过社区参与、逆向工程和潜在法律手段推动该公司合规 1。
在具体的违规细节方面，Bambu Lab的Bambu Studio软件是基于采用AGPLv3许可的开源切片软件PrusaSlicer修改而来的 1。该公司未提供源代码或提供源代码的书面承诺，直到2022年或2023年在社区压力下才发布源码 1。同时，Bambu Lab还涉嫌违反GPLv2，未提供基于Buildroot的Linux固件源代码 1。此外，Bambu Lab的动态加载组件通过网络调用服务器端功能，使用特定User-Agent字符串作为访问密钥 1。Bambu Lab声称该User-Agent机制属于DMCA反规避措施 1。波兰用户Paweł Jarczak逆向工程了User-Agent字符串和网络代码后，收到了Bambu Lab的DMCA删除通知 1。
SFC已为3D打印维权项目筹集超过25万美元 1。凭借这笔资金，SFC现可聘请全职诉讼律师 1。
At the FOSSY 2026 conference, Software Freedom Conservancy (SFC) members Bradley Kühn, Karen Sandler, and Denver Gingerich delivered a presentation addressing alleged license violations by Bambu Lab regarding its 3D printer software 1. The company, which captured between 38% and 48% of the market share for 3D printers priced between $500 and $3,000 in 2025, faces accusations of infringing both the AGPLv3 and GPLv2 licenses 1. Specifically, Bambu Studio was developed by modifying the open-source slicing software PrusaSlicer, which is licensed under AGPLv3, yet the company failed to provide the complete source code or a written offer for it until community pressure forced a release in 2022 or 2023 1. Additionally, Bambu Lab is suspected of violating GPLv2 by not releasing the source code for its Buildroot-based Linux firmware 1.
Furthermore, Bambu Lab circumvented AGPLv3 restrictions through its network components 1. These dynamic loading components call server-side functions over the network and utilize a specific User-Agent string as an access key 1. Bambu Lab has claimed that this User-Agent mechanism constitutes an anti-circumvention measure under the Digital Millennium Copyright Act (DMCA) 1. Consequently, a Polish user named Paweł Jarczak, who reverse-engineered the User-Agent string and the associated network code, received a DMCA takedown notice from Bambu Lab 1.
In response to these compliance issues, the SFC is pursuing enforcement through community engagement, reverse engineering, and potential legal action 1. For its 3D printing compliance project, the SFC has raised over $250,000, exceeding its fundraising goal 1. This financial milestone enables the organization to hire a full-time litigation attorney 1.
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