Circle's cirBTC Goes Live as Collateral on Aave's Ethereum Markets

Circle Wrapped Bitcoin, or cirBTC, is now live as collateral on Aave V3 Core and Aave V4 Core Hub on Ethereum, Aave said in a post on November 10, 2026. Per Aave's announcement on X, users can supply cirBTC and borrow assets including USDC against it on both market instances.

What the Aave Ethereum assessment covers

The listing follows a technical and risk review published on Aave's governance forum the same day. The assessment thread, opened by the Aave governance account, states it serves as "the home for all risk and technical assessments of cirBTC on Aave Ethereum." It collects three components in one place: a pre-listing asset risk assessment conducted under the Aave Risk Framework, a pre-listing technical asset assessment conducted under the Technical Asset Listing Framework, and ongoing post-listing monitoring reports that will be added as replies as they are produced.

As of publication, the forum thread shows two posts from a single participant, consistent with an initial scaffold that Aave's own governance process will build out over time with periodic refresh assessments or re-evaluations triggered by material changes to the asset. Neither the X post nor the governance thread discloses specific loan-to-value ratios, supply caps, or liquidation thresholds for cirBTC; those figures typically appear in subsequent governance forum replies or snapshot votes rather than the initial listing announcement.

Why a Circle-wrapped Bitcoin asset matters for Aave's markets

cirBTC represents Circle's wrapped Bitcoin product, bringing another Bitcoin-backed collateral option into Ethereum's largest lending protocol by total value locked. Wrapped Bitcoin tokens let holders use BTC-denominated value inside Ethereum's DeFi ecosystem without moving off the Bitcoin network itself, a mechanic that has underpinned products like WBTC for years. Aave listing a new issuer's wrapped BTC variant signals continued competition in that wrapper market, alongside established tokens already integrated across Ethereum's lending and collateral markets.

The dual listing across both Aave V3 Core and the newer V4 Core Hub is notable because it places cirBTC inside Aave's next-generation architecture from day one, rather than waiting for a V3-to-V4 migration cycle. Users supplying cirBTC as collateral can borrow stablecoins such as USDC, per Aave's announcement, expanding the set of Bitcoin-backed borrowing options available directly on Ethereum mainnet without a separate bridge step.

What remains unstated in both the X post and the governance thread is the specific risk parameters — supply caps, collateral factors, oracle configuration — that determine how much cirBTC-backed borrowing the protocol will permit. Readers tracking the listing can follow updates directly in the governance thread, where Aave says all post-listing monitoring reports and re-evaluations will be posted as replies to preserve a single historical record. Those seeking background on how collateralized lending protocols structure these risk parameters more broadly can consult CoinsCipher's guide to DeFi protocols.