AI companies leak data to advertisers [pdf]

(jorgegarciaherrero.com)

85 points | by damaru2 2 hours ago

12 comments

  • Coeur 48 minutes ago
    "multiple providers disclose sensitive conversation-derived artifacts — including titles, prompts, and screenshots — to third parties, often alongside persistent user identifiers that enable user attribution. We also find that some providers publicly expose conversation permalinks without access controls, allowing trackers to read the entire conversation."

    Not good at all.

    • postalcoder 15 minutes ago
      My least favorite trend I’ve noticed with so many AI chat services is they seem to equate a UUID in the url with privacy.

      Perplexity does this. Visiting a past perplexity search url exposes your full conversation.

      • msdz 3 minutes ago
        Genuinely asking: If you don’t share the UUID-based URL yourself, what makes it not privacy-friendly?

        It’s not like someone’s gonna guess that URL… right?

        • postalcoder 1 minute ago
          Yes, technically, guessing a url is impossible. But browser histories are trivially accessible to sketchy actors.
  • j4k0bfr 8 minutes ago
    This is a bit surprising to me, considering how much AI companies love to hoard data. Especially since some of these ad companies are direct competitors!

    My best guess is that these ad mechanisms are a bit rushed and/or that investor demands for profitability are fighting against company self-interest.

    Edit: I guess some data will always need to be leaked for AI chat ads to be most effective. But I imagine AI companies would rather deliver the targeted ads themselves rather than letting competitors do it for them. It would be scary to see AI companies become ad companies too (instead of just hosting them).

    • amarcheschi 1 minute ago
      I'm taking an onboarding process for an Ai company helping other (much) bigger Ai companies and the amount of vibecoded platforms and documentation is staggering. Like, training process so broken that the platform just doesn't load sometimes, things that have never even been tried are published and you have to use them and they suck so much because it is apparent that no human ever touched that and probably wouldn't want to
    • alansaber 4 minutes ago
      AI companies rushing an implementation? Surely not :).
  • pluc 5 minutes ago
    You thought... they didn't?
  • gagan2020 19 minutes ago
    All sells but I saw Chinese models are upfront about that most of the time.
  • robertclaus 3 minutes ago
    Hanlon's Razor given that these tools are almost certainly vibe coded at this point?
  • DrMandalay 25 minutes ago
    The word is "sell" not "leak". This title takes away all agency from the thieves selling private data to advertisers.
  • reedf1 17 minutes ago
    my first guess is always Gboard.
  • charcircuit 39 minutes ago
    The paper doesn't say when the app sends the conversion artifact.
  • classified 42 minutes ago
    Is it still called a leak if it was the whole point and purpose of the deal?

    Someone should have to investigate, but I suppose it's all "legal"?

    • lava_pidgeon 13 minutes ago
      In the US.

      In EU law it is very likely against GDPR.

  • folkrav 42 minutes ago
    Insert surprised pikachu meme
  • damaru2 2 hours ago
    Entire conversations via exposed permalinks. For Grok: trackers receiving the conversation URL could access the full chat because the link lacked access controls.

    Screenshots of conversations. TikTok received screenshots of Grok chats during sharing, exposing the actual visible conversation content.

    Conversation-derived content tied to persistent identifiers, including prompts and automatically generated chat titles revealing sensitive facts. "Salary 85k NYC: mortgage 280–350k".

  • irregularbowels 1 hour ago
    [dead]