On November 23, Intersect published "Facts at a Glance" regarding the November 21 Cardano mainnet incident. A malformed transaction exploited a deserialization bug, causing a temporary chain partition. The network never went offline, and no funds were stolen. A coordinated ecosystem response, involving node upgrades to v10.5.2/v10.5.3 by SPOs and exchanges, restored convergence within 14.5 hours.

The November 21, 2025, development report highlights a mainnet chain partition caused by a malformed transaction, which was resolved with hotfix node v.10.5.3. The ledger team defined sub-transactions for the Dijkstra era, while the Plutus team finalized costing for Value primitives for the upcoming hard fork. Lace v.1.31 was released with in-wallet token swaps and Bitcoin wallet support. Mithril completed the first phase of decentralizing configuration parameters.

In a November 20 blog post, Intersect announced a proposal for the next Cardano mainnet hard fork. This upgrade stems from recently completed core Haskell node work. To manage this process, Intersect will convene a Hard Fork Working Group (HFWG) to coordinate ecosystem feedback, impact assessment, and communication before any formal governance actions are raised. An initial virtual HFWG event is scheduled for December 2 to discuss impact, communication, and naming conventions.

Intersect has launched a Bug Bounty Program to reinforce the security of the Cardano open-source ecosystem. This initiative invites ethical hackers to identify and report vulnerabilities in critical repositories, offering rewards for valid findings. By crowdsourcing security research, Intersect aims to proactively discover potential issues, ensuring the network's resilience and stability while fostering a collaborative approach to maintaining Cardano's core infrastructure.

The November 14, 2025, development report highlights the consensus team addressing 'bufferbloat' issues from the Leios demo and enhancing resource management. Scaling updates include Mithril releasing hotfix 2543.1 and Hydra improving partial fanout and introducing 'SafeClose' safety features. Intersect announced election results with high turnout. Project Catalyst Fund15 launched, introducing a new "Midnight: Compact DApps" category alongside three Cardano-focused funding tracks. The education team is conducting a developer course in Buenos Aires.

The November 07, 2025, development report highlights the Plutus team's hosting of UPLC 2025 and the addition of a new scaleValue primitive for the upcoming intra-era hard fork. Scaling updates include Mithril's release of distribution 2543.0 with enhanced database restoration and the Hydra team's v1.1.0 release. Intersect committee election voting concluded, with results expected on November 14. Ecosystem news features the Ouroboros Phalanx upgrade and a new Compact DApps category for Catalyst Fund15.

In a blog post from November 6, Intersect's Growth and Marketing Committee shared key findings from their first community-wide marketing survey. The results highlight a strong demand for unified messaging and increased support for developers and founders. Respondents prioritized DeFi and real-world use cases, advocating for treasury-backed liquidity programs. While grassroots efforts are effective, there is a clear call for better storytelling tools and a cohesive long-term vision to guide Cardano's growth.

The October 31, 2025, development report highlights the Hydra v1 announcement, marking the protocol as production-ready. The ledger team also finalized CIP-118 (nested transactions/Babel fees). IOG published a deep dive on Ouroboros Phalanx, a mechanism to deter grinding attacks, and the consensus team showcased a Leios prototype. Intersect committee elections are underway, and Project Catalyst Fund15 is set to launch on November 5.

A blog post by Olga Hryniuk on October 26, 2025, announced that the Hydra protocol has reached v1 and is now production-ready. This scaling solution enables high-throughput, low-latency applications by processing transactions off-chain in 'Heads' while retaining layer 1 security. Validated by Midnight’s Glacier Drop, this release delivers a feature-complete protocol, stable API, and interoperability improvements.

The October 24, 2025, development report highlights ecosystem growth to 2,014 projects and the Cardano Foundation's plan to apply for .ada and .cardano gTLDs. Wanchain launched a bridge to Sonic. The Mithril team advanced incremental snapshots and configuration decentralization. Intersect committee election voting is set to begin October 27, and Project Catalyst announced Fund15 will launch on November 5.