OBI, a home improvement and DIY retail chain (OBI Hungary Retail Kft.) — 266 requests, 16 domains. The site has the Usercentrics consent management platform, and the policy names Google, Kameleoon, and Facebook in detail. But the consent manager loads after the trackers: Instana (monitoring), Kameleoon (A/B testing), and Google Tag Manager fire roughly 1.4 seconds before it. Instana, meanwhile, is not named in the policy at all and is already transmitting data.
Timeline of the leak
Declared versus actual
Transfer timings
Instana RUM (monitoring). An IBM product. Not named in the policy.
Kameleoon — A/B testing and personalization. France/EU.
gtm.js — container GTM-MF3JDS. Google, USA.
Usercentrics CMP — loads after the trackers. Germany/EU.
Instana — actual transmission of monitoring data.
Detected trackers
- Instana (eum.instana.io — real user monitoring, RUM) — prior to consent, not named in the policy
- Kameleoon (711fblc77j.kameleoon.eu — A/B testing and personalization) — prior to consent; declared in the policy
- Google Tag Manager (gtm.js, GTM-MF3JDS) — prior to consent; Google services are declared in the policy
- Usercentrics — consent management platform (not a tracker), loads at +1614 ms, after the trackers
Indicators of GDPR non-compliance
- ePrivacy (Hungarian implementation) — trackers loading before the consent management platformThe site has the Usercentrics consent management platform installed, but it loads only at +1614 ms — already after Instana (eum.instana.io/eum.min.js at +172 ms), Kameleoon (711fblc77j.kameleoon.eu/engine.js at +173 ms), and Google Tag Manager (gtm.js, GTM-MF3JDS at +253 ms) have fired. That is, tracker scripts connect before the mechanism intended to govern them has initialized. Instana, meanwhile, actually transmits monitoring data (calls to eum-blue-saas.instana.io at +2533 and +4600 ms). Kameleoon — an A/B-testing and personalization tool requiring prior consent — likewise starts before the consent manager. Set-Cookie across the session is zero; there is no consent, yet the calls have already been sent.
- GDPR Art. 13(1)(e) + Chapter V — disclosure of recipients and cross-border transferOBI's detailed privacy notice (adatkezelési tájékoztató) names Google services, Kameleoon, Facebook, and marketing cookies, but does not mention the Instana monitoring service at all. Meanwhile, prior to consent, Instana transmits behavioral and performance data to a third-party recipient (Instana, an IBM product). One of the third-party recipients actually in operation is thus undisclosed in the policy.
Context
obi.hu is the Hungarian online storefront of the OBI retail chain, selling home, garden, and DIY products. The data controller is OBI Hungary Retail Kft. (Budapest). The storefront is served via Amazon CloudFront; the infrastructure includes the domains obi.de/obi.hu, the imgix image CDN, and the baqend accelerator; strong HSTS (preload) is present. Capture: 266 requests, 16 domains, recorded in a clean browser.
Direct Recipients of Data (prior to consent)
Instana (an IBM product) — monitoring data and IP address. Kameleoon (France/EU) — A/B-testing data. Google (USA) — via the loading of Google Tag Manager.
Declared versus Actual
Unlike simpler sites, OBI is thoroughly prepared: it has an extensive privacy notice that names Google services, Kameleoon (as an A/B-testing tool), Facebook, and marketing cookies by name, and a genuine consent management platform — Usercentrics. That is, both disclosure of recipients and a consent mechanism are formally present.
The capture, however, reveals the same flaw seen at a number of CMP-equipped portals: the loading order. The Usercentrics consent manager connects only at +1614 ms, whereas Instana loads at +172 ms, Kameleoon at +173 ms, and Google Tag Manager at +253 ms. All three trackers start roughly a second and a half before the mechanism intended to govern them initializes. Instana, moreover, does not stop at merely loading its library: at +2533 and +4600 ms, it transmits monitoring data to eum-blue-saas.instana.io. Kameleoon — an A/B-testing and personalization tool that, under the rules, requires prior consent — likewise starts before the manager.
The second problem is disclosure. Of the three third-party services that fire prior to consent, Kameleoon and Google are named in the policy, but Instana is not mentioned at all. That is, prior to consent, the site runs a monitoring service (an IBM product) that transmits behavioral and performance data to a third-party recipient the policy does not disclose.
Timing Relative to Consent
Instana, Kameleoon, and Google Tag Manager fire at +172–253 ms; the Usercentrics consent manager at +1614 ms. The key point: the trackers fire before the manager, and Instana is already transmitting data prior to consent. No consent was given during the session (Set-Cookie is zero).
What Cannot Be Asserted from This Capture
The Google Tag Manager container is loaded, but there is no separate GA /g/collect call within the capture window — some Google tags may be held back until consent via a consent mode; the HAR cannot establish that Google’s analytics or advertising tags actually fired, although the loading of GTM itself already contacts Google. No Facebook pixel is observed in the capture (the facebook.svg found is a local icon). Usercentrics is a consent management platform (Germany/EU), not a tracker. Kameleoon is a French (EU) company, so the cross-border-to-third-countries aspect is weaker in its case; the principal concern is its firing before the consent manager. Instana is an IBM product; the specific region of the eum-blue-saas SaaS endpoint cannot be determined from the capture, so the conclusion drawn concerns the recipient service’s corporate affiliation, not the location of the node. Server-side processing is not visible in a browser-based capture.
Conclusion
The online storefront of the OBI retail chain is thoroughly prepared: a detailed policy names Google, Kameleoon, and Facebook, and consent is governed by a fully functioning Usercentrics manager. Nevertheless, the implementation fails in two places. First, the trackers — Instana, Kameleoon, and Google Tag Manager — load before the consent manager itself initializes, so data is already transmitted prior to consent: Instana actually transmits monitoring data, and Kameleoon (an A/B-testing tool requiring consent) starts unconditionally. Second, Instana is not disclosed in the policy at all. The firing of trackers and the transfer of data to third-party recipients prior to actual consent, despite the presence of a consent manager that does not function effectively, together with the non-disclosure of one of the recipients, constitutes a violation of the requirements concerning the proper sequencing of consent and disclosure of recipients. The remedy is within the operator’s control: load Instana, Kameleoon, and Google Tag Manager only after the consent manager initializes and consent is given, and add Instana to the policy as a data recipient.
6f844f59af2ef0a075e811617a93bf370819e9bf7ca3acee6665e8f321e6fce6Where to file: Hungarian National Authority for Data Protection (NAIH) — file a complaint online →
To: Hungarian National Authority for Data Protection (NAIH) From: [Your name], [contact email] 1. Subject of the complaint I am filing a complaint regarding the processing of my personal data by the website obi.hu. 2. Circumstances I visited the website obi.hu and found indications that the processing of my personal data does not comply with the GDPR. The technical analysis published on gdpru.eu on 29 May 2026 (open methodology, reproducible measurements) documents the following indications: 1) The site has the Usercentrics consent management platform installed, but it loads only at +1614 ms — already after Instana (eum.instana.io/eum.min.js at +172 ms), Kameleoon (711fblc77j.kameleoon.eu/engine.js at +173 ms), and Google Tag Manager (gtm.js, GTM-MF3JDS at +253 ms) have fired. That is, tracker scripts connect before the mechanism intended to govern them has initialized. Instana, meanwhile, actually transmits monitoring data (calls to eum-blue-saas.instana.io at +2533 and +4600 ms). Kameleoon — an A/B-testing and personalization tool requiring prior consent — likewise starts before the consent manager. Set-Cookie across the session is zero; there is no consent, yet the calls have already been sent. 2) OBI's detailed privacy notice (adatkezelési tájékoztató) names Google services, Kameleoon, Facebook, and marketing cookies, but does not mention the Instana monitoring service at all. Meanwhile, prior to consent, Instana transmits behavioral and performance data to a third-party recipient (Instana, an IBM product). One of the third-party recipients actually in operation is thus undisclosed in the policy. Full technical documentation is published at: https://gdpru.eu/en/audits/hu-obi-hu/ 3. Provisions violated ePrivacy (Hungarian implementation) — trackers loading before the consent management platform; GDPR Art. 13(1)(e) + Chapter V — disclosure of recipients and cross-border transfer 4. Request I request that you investigate the violations described and apply the measures provided for in Article 58(2) GDPR. 5. Attachments The full evidence base — the HAR file, its SHA-256 checksum and the quotation from the site's privacy policy documenting the stated contradiction — is published and verifiable at the link in point 2 above. [Date] [Signature / name]