Bluesky said a recent day-long disruption was caused by a distributed denial-of-service attack, according to TechCrunch. The social networking site confirmed the incident in a Monday post, saying the attack had taken place over the prior 24 hours and involved junk traffic aimed at the service. Bluesky said it had “upgraded” its defenses in response and was continuing to monitor the situation, TechCrunch reports. The company did not provide further technical details in the post, and a Bluesky spokesperson did not immediately answer TechCrunch’s questions about the incident. A distributed denial-of-service, or DDoS, attack attempts to overwhelm a website or server by sending large volumes of traffic at it. TechCrunch notes that these attacks often draw on hijacked internet-connected devices, residential proxy networks, or botnets to generate the volume needed to strain the target’s resources and knock services offline. The attribution remains less settled. TechCrunch reports that security researchers discussing the incident in the IFIN public forum said Iran-backed attackers had claimed responsibility. That claim has not been independently corroborated in the provided material, and Bluesky’s own public statement, as reported by TechCrunch, did not identify an attacker. The outage is not the first large-scale DDoS incident to affect Bluesky this year. TechCrunch says the site suffered a prolonged series of outages in April caused by a similar flood of web traffic. It remains unclear whether the April incident and the latest attack are connected. For now, the confirmed operational takeaway is narrower than the attribution question: Bluesky says its availability was disrupted by another DDoS attack, has adjusted its defenses, and is still watching for follow-on activity. Who benefits: DDoS mitigation providers and infrastructure teams benefit when high-profile outages push platforms to reassess traffic filtering and resilience. Users benefit only if Bluesky’s upgraded defenses reduce repeat disruptions. Who's exposed: Bluesky remains exposed to follow-on attacks while the situation is being monitored. Other public-facing social and web services face similar availability risks from large volumes of junk traffic.