Luke Dashjr, one of the Bitcoin Core developers, expressed concern about a vulnerability in the Bitcoin blockchain, which he believes could be used for spam distributions. He noted that this issue was resolved in Bitcoin Knots version v25.1, but warned that the vulnerability still exists in the upcoming v26 update. Dashjr expressed hope that it would be fixed before the next Bitcoin Core version is released in 2024.

"Ordinals" exploit a vulnerability in Bitcoin Core for spamming the blockchain. Since 2013, Bitcoin Core has allowed users to set a limit on the size of additional data in transactions they transmit or mine. By hiding their data under program code, "Ordinals" circumvent this restriction, Dashjr said.

During the discussion, a user asked about the impact of fixing the vulnerability on the existence of Ordinals and the BRC-20 standard. Dashjr confirmed that after the vulnerability is addressed, these elements will cease to function. He critically spoke about Ordinals, calling them an attack on Bitcoin and a deception, as they were never officially approved.

Earlier in May, members of the Bitcoin Core team, including Ali Sherif and Luke Dashjr, proposed implementing mechanisms for filtering spam in Taproot transactions. This was aimed at blocking Ordinals and tokens based on the BRC-20 standard.