Ethereum Foundation Faces Lawsuit Over Employee’s Firing After Mandate Dispute

TL;DR

• Former Ethereum Foundation employee Kayleen Fulton filed a lawsuit on November 4, 2026, accusing the organization and several executives, including Vitalik Buterin, of wrongful termination and disability discrimination.
• The dispute centers on the Foundation’s Mandate, which contained a controversial “Source Seppuku License” provision that triggered employee objections.
• The case follows a major organizational restructuring that eliminated 54 positions, raising additional questions about internal management and governance at the nonprofit.
  

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The Ethereum Foundation is facing a legal challenge after former employee Kayleen Fulton accused the organization of dismissing her following disagreements over an internal policy document and the disclosure of her cancer diagnosis. The lawsuit, filed in Colorado federal court, also names Ethereum co-founder Vitalik Buterin among the defendants.

The allegations have attracted attention across the crypto industry because they involve the organization responsible for supporting Ethereum’s development. However, the dispute concerns employment practices and internal leadership decisions rather than the technical operation of the blockchain itself.

looks like @nixorokish is suing the Ethereum Foundation about her Mandate-related firing

it's an interesting doc b/c (if allegations, including alleged recording of Vitalik without his consent, are true) it confirms a lot of rumors that were swirling around the Mandate

my take:…

— gabriel shapiro (@lex_node) November 9, 2026

Ethereum Foundation Lawsuit Centers On Controversial Mandate

According to the complaint, Fulton disclosed her cancer diagnosis to management on March 24, 2026. She alleges that her employment was terminated on April 6, shortly after she helped organize opposition to the Foundation’s Mandate.

The document, initially circulated among employees in February and officially published on March 13, outlined the organization’s mission and operating principles. It emphasized censorship resistance, open-source development, privacy and security, collectively known as CROPS.

However, its eleventh page contained a section titled “Source Seppuku License,” featuring language describing suicide with a sword as a consequence for failing to uphold its commitments.

The wording generated objections among employees. The complaint says 79 workers voted to remove the passage, while Fulton and colleague Trent Van Epps helped organize a letter signed by 53 employees expressing reservations about the commitment process.

Management reportedly clarified that the language was not intended literally. Nevertheless, the provision remained in the published document, which the Foundation permanently recorded on Ethereum’s blockchain.

The complaint also references a conversation between Fulton and Buterin after her dismissal. According to the filing, Buterin discussed the organizational consequences of rewarding employees for publicly challenging management decisions.

Workforce Restructuring Adds Pressure On Ethereum Foundation

The lawsuit arrives after substantial organizational changes. On June 23, 2026, the Foundation announced that 54 employees, approximately 20% of its workforce, would leave as part of a restructuring.

The new organization introduced five operational clusters covering protocol development, access, user experience, community engagement and institutional adoption. The Foundation described the changes as necessary to concentrate resources on Ethereum’s long-term priorities.

Fulton also alleges that her previous performance reviews were positive and that she had not received formal disciplinary warnings before her dismissal. She is seeking compensation for lost earnings and other damages.