Shiba Inu has restored BONE transfers on Shibarium's Plasma Bridge, re-enabling deposits and withdrawals between Ethereum and the Layer 2 network after a security incident led to a month-long pause. In an October 14 post, primary contributor Kal Dharia wrote that “Plasma Bridge is back online for BONE, after a comprehensive review and a series of security improvements,” adding that users can now bridge BONE “with a more secure, stronger, and more flexible experience.”
Shiba Inu relaunching Shibarium Bridge
The relaunch comes after the Shibarium bridge was restricted in mid-September following a validation key compromise that enabled a malicious exit on the PoS bridge. In its September 21 incident report, Dhaheriya stated that “on September 12, 2025 at 18:44 UTC, unauthorized validator signature power was used to push a malicious state/exit via a proof-of-stake bridge, withdrawing multiple assets,” prompting immediate containment measures and a broader hardening program. The team said at the time that it would publish full technical details once it was safe to do so and that “the bridges remain restrained during containment/solidification.”
The Shibarium team is positioning the reopened BONE Bridge as the first step in a phased restoration of services, supported by new policy-level operational controls. The most noticeable change for users is the mandatory delay before withdrawals are finalized: “All BONE Plasma withdrawals now include a 7-day final delay. This buffer gives operators and security teams time to spot and respond to unusual activity before funds are finalized – significantly improving defense without removing user access.” The post portrays the delay as strengthening Plasma's fraud-resistant safeguards.
Another control introduced at the bridge layer is proactive blacklisting of addresses. According to the team, the new mechanism “allows us to flag and block suspicious addresses at the bridge layer,” with the aim of preventing repeated abuse across the ecosystem. The Shiba Inu team also stressed that significant code changes underwent external review: “All significant changes were reviewed by Hexens, adding an independent layer of expert scrutiny.” The relaunch followed a validation sequence that included unit tests, end-to-end simulations, deployment on the public testnet (“Puppynet”), and “multiple timeframe” monitoring before production activation.
The October 14 update also addresses a separate thread from the September incident involving KNINE and minor OSCAR token flows. The Shiba Inu team revealed that the attacker “drained and sold approximately $600 in OSCAR tokens from the bridge but ignored the 5 ETH redemption offer for KNINE tokens,” which now remain blacklisted and unusable for the attacker. The previously announced KNINE bounty has “expired,” the team said, but it plans a “conditional final bounty (amount TBD) for the full return of all KNINE held by attacker-controlled addresses,” stressing that partial returns will not be eligible and that the terms will only appear on verified channels.
While only BONE lives on the Plasma Bridge today, Shibarium has indicated a broader roadmap. The team plans to “gradually re-enable other tokens” and is “finalizing a fair and transparent payment framework for affected users,” with publishing details once done will not increase the risk. This post highlights the considered stance following the September settlement: “Safety first: We will not publish details that could be manipulated while security work is ongoing. Expect measured, verifiable updates.”
The context surrounding the month-long outage highlights the extent of the treatment behind the scenes. In late September, Shibarium detailed validator signatory rotations, contract control migrations to multilateral device custody, contract-level targeted protection, direct monitoring and exchange coordination, and the engagement of independent security and incident response specialists. The September 21 update also acknowledged shortcomings in decentralization of verification processes and outlined a hardening plan “in progress in collaboration with Hexens,” with recovery contingent on third-party approvals and successful exercises on test environments.
For now, the reopening restores the critical path for validators, liquidity providers, and users who rely on BONE's movement between Ethereum and Shibarium. As the post concluded, the new safeguards – including the blacklist and 7-day challenge window – are intended to align the bridge user experience with the practical realities of operating a plasma-style system under hostile conditions: “Every new safeguard, every additional check, and yes – even a 7-day delay – reflects one fundamental principle: protecting the community.”
At press time, the Shiba Inu Token (SHIB) was trading at $0.00001060.
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