Hello,

We were notified by Pretix, the company hosting the ticketing system we have 
used for our events for the last few years, of a security incident, which in 
theory could lead to exfiltration of personal information of people who bought 
a ticket. 

The issue in their software has been resolved by Pretix, and no evidence has 
been found that this vulnerability has been exploited. More information on this 
can be found here: https://pretix.eu/about/en/blog/20260216-release-2026-1-1/

We realise that many of you use unique email addresses to identify sources of 
spam, so if you do see any unexpeced email on the address you used to for 
obtaining a ticket, please do let us know, so we can contact Pretix about it.

Even although this doesn't help for this incident, for future events we will 
make sure that we will quickly remove all personally identifiable information 
(PII) after the event has taken place. And of course we will make sure to to 
this for past events now.

On behalf of the NLNOG board,
Teun
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