Klue data breach: what happened and what to do
Last reviewed October 8, 2026 · 2 records on file · sources listed below
Klue experienced a data breach where attackers exploited forgotten OAuth grants to gain access to corporate data.
If you have an account with Klue, assume the exposed details are circulating. The practical risk today is rarely the leak itself — it is the calls and messages that use those details to sound legitimate.
What we have on file
Every entry below is a catalogued record with its original source. We do not paraphrase beyond what the source reports.
Personal Information · Vulnerability Exploitation
Personal Information · Hacking
Market research company Klue was hacked, resulting in the theft of customer data. The company reported that the initial hacking group is deleting the stolen data, while a separate group of hackers has emerged making ransom threats.
What to do
- Change the password anywhere you reused itThe exposure matters most when the same password protects your email, because email is how everything else gets reset.
- Treat every call and text about this breach as a scam until proven otherwiseNo company will ask you for a one-time code, a PIN or a password. Hang up and call the number printed on your card.
- Read your statements for the next three monthsCard fraud usually starts with a small test charge. Catching that one is what stops the large one.
- Give your email account a password nothing else usesIt is the account that can reset all the others, so it is the one worth protecting first.
Questions people ask
Was my data in the Klue breach?
Having an account alone does not confirm exposure. The reliable check is whether your email address appears in the leaked datasets in circulation — that takes seconds and does not require your password.
Is it too late to do anything?
No. Leaked personal details do not expire, and neither does the defence: a unique password on your email, and a fraud alert on your credit file, still work years later.
Will Klue contact me?
They may. But scammers contact people too, using exactly these breach details to sound convincing. Never act on an inbound call or text — call back on a number you already had.
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