HBO Spain appears to have broadcast the next episode of "Game of Thrones" four days early, according to The Independent.
The Independent reported Wednesday that the episode was available to HBO’s Spanish subscribers for one hour before getting removed.
The apparent oversight left the next episode of the popular series – the sixth installment of its seventh series – vulnerable to ripping and sharing online.
Footage from the episode has since appeared on Instagram, Twitch, YouTube and other streaming sources before being pulled.
The new chapter was also posted on Reddit, according to The Independent, and spoilers have erupted in at least one thread there.
The Independent additionally confirmed that torrents of the episode exist and are available in high definition.
The episode is being uploaded to sites like Mega.nz quicker than HBO can stop them, the news outlet reported.
The next "Game of Thrones" episode is titled “Death Is the Enemy” and is scheduled to air on HBO this Sunday.
The installment is likely pivotal to the series’ plot, as there is only one other episode remaining before the show’s seventh season closes.
HBO has repeatedly struggled with keeping new entries in the "Game of Thrones" story secret as it progresses.
Hackers reportedly leaked a series of HBO documents earlier this month, for example, that included a detailed script summary of season seven’s fifth episode.
The fourth episode of the current season also leaked online earlier in August, meanwhile, in an incident that was unrelated to the recent hacking of HBO.
HBO’s distribution partner Star India confirmed that it was the source of the leak after footage emerged online of a watermark implicating it as the origin.
"Game of Thrones" is one of HBO’s most beloved narratives and recounts an epic struggle over the fictional seven kingdoms of Westeros.