Nimbus
Status · Nim · MIT OR Apache-2.0
Nim consensus client optimised for low-resource hardware.
consensusvalidatorEthereum MainnetHoodiSepoliaHoleskyEphemery
Required by network upgrades
| Upgrade | Network | Minimum |
|---|---|---|
| Glamsterdam | Sepolia | ≥ 26.10.0 |
| Fusaka | Ethereum Mainnet | ≥ 25.11.1 |
Releases
32 releases
Nimbusnightly
Oct 26, 2026
Nimbusv26.10.2
Why this rating
- high (hoodi); low (all networks): The Nimbus consensus client v26.10.2 release is high-urgency for Hoodi due to unscheduling its Glamsterdam fork activation per and low-urgency for other networks.
Oct 23, 2026
Nimbusv26.10.1
Why this rating
- high (hoodi); medium (all networks): The Nimbus consensus client v26.10.1 release is high-urgency for Hoodi due to its 26th October Glamsterdam fork activation, medium-urgency for other networks, and focuses on Glamsterdam improvements …
Oct 16, 2026
Nimbusv26.10.0
Why this rating
- high (sepolia); medium (all networks): The Nimbus consensus client v26.9.0, v26.9.1, or v26.10.0 are high-urgency releases for Sepolia due to its 6th October Glamsterdam fork activation and medium-urgency releases for other networks.
Oct 4, 2026
Nimbusv26.9.1
Why this rating
- high (sepolia); medium (all networks): The Nimbus consensus client v26.9.0 or v26.9.1 are high-urgency releases for Sepolia due to its 6th October Glamsterdam fork activation and medium-urgency releases for other networks. v26.9.1 specifi…
Sep 30, 2026
Nimbusv26.9.0
Why this rating
- high (sepolia); medium (all networks): The Nimbus consensus client v26.9.0 is a high-urgency release for Sepolia due to its 6th October Glamsterdam fork activation and a medium-urgency release for other networks.
Sep 29, 2026
Nimbusv26.8.0
Why this rating
- medium (all networks): The Nimbus consensus client v26.8.0 is a medium-urgency release with additional beacon API support.
- performance wording: "- Optimize KZG verification using thread pooling:"
Aug 28, 2026
Nimbusv26.7.0
Why this rating
- medium (all networks): The Nimbus consensus client v26.7.0 is a medium-urgency release which optimizes CPU and memory usage.
- performance wording: "The Nimbus consensus client v26.7.0 is a medium-urgency release which optimizes CPU and memory usage."
Jul 13, 2026
Nimbusv26.6.2
Why this rating
- medium (all networks): The Nimbus consensus client v26.6.2 is a medium-urgency release which mitigates regressions in attestation performance and bandwidth usage in v26.6.0.
- performance wording: "The Nimbus consensus client v26.6.2 is a medium-urgency release which mitigates regressions in attestation performance and bandwidth usage in v26.6.0."
Jun 29, 2026
Nimbusv26.6.0
Why this rating
- medium (all networks): The Nimbus consensus client v26.6.0 is a medium-urgency release which improves performance and resilience.
- performance wording: "The Nimbus consensus client v26.6.0 is a medium-urgency release which improves performance and resilience."
Jun 22, 2026
Nimbusv26.5.0
Why this rating
- medium (all networks): The Nimbus consensus client v26.5.0 is a medium-urgency release which improves performance and execution client compatibility.
- performance wording: "The Nimbus consensus client v26.5.0 is a medium-urgency release which improves performance and execution client compatibility."
May 11, 2026
Nimbusv26.3.1
Why this rating
- medium (mainnet): The Nimbus consensus client v26.3.1 is a medium-urgency release for Ethereum which improves column-handling performance and increases validator client robustness.
- performance wording: "The Nimbus consensus client v26.3.1 is a medium-urgency release for Ethereum which improves column-handling performance and increases validator client robustness."
Mar 28, 2026
Nimbusv26.3.0
Why this rating
- low (all networks): The Nimbus consensus client v26.3.0 is a low-urgency release which improves blob and column-handling performance.
- performance wording: "The Nimbus consensus client v26.3.0 is a low-urgency release which improves blob and column-handling performance."
Mar 2, 2026
Nimbusv26.2.1
Why this rating
- low (all networks); medium (mainnet): The Nimbus consensus client v26.2.1 is a low-urgency, packaging-fix-only release for ARM and multiarch Docker images for anyone running v26.2.0 and otherwise medium-urgency due to addressing the caus…
Feb 18, 2026
Nimbusv26.2.0
Why this rating
- medium (all networks): The Nimbus consensus client v26.2.0 is a medium-urgency release with improved network stability.
- consensus-safety wording: "In particular, it addresses a scenario during which Nimbus clients falsely rejected as invalid a mainnet block and forked off."
Feb 14, 2026
Nimbusv26.1.0
Why this rating
- low (all networks): The Nimbus consensus client v26.1.0 is a low-urgency release with improved validator client stability.
Jan 29, 2026
Nimbusv25.12.0
Why this rating
- medium (mainnet): The Nimbus consensus client v25.12.0 is a medium-urgency release for mainnet due to network stability improvements.
- performance wording: "- Fix stack traces memory leak:"
Dec 18, 2025
Nimbusv25.11.1
Why this rating
- high (mainnet); medium (all networks): The Nimbus consensus client v25.11.1 is a high-urgency release for mainnet due to the impending Fusaka fork and a medium-urgency release on other networks due to stability fixes.
- consensus-safety wording: "- Fix blocking of command-line-supplied invalid blocks:"
Nov 28, 2025
Nimbusv25.11.0
Why this rating
- high (mainnet); low (all networks): Nimbus v25.11.0 is a high-urgency release for mainnet due to the impending Fusaka fork on 3 Dec and a low-urgency release on other networks.
Nov 3, 2025
Nimbusv25.10.0
Why this rating
- low (all networks): Nimbus v25.10.0 is a low-urgency release which increases the default gas limit to 60M, improves beacon API support, adds runtime configuration flexibility, and removes macOS amd64 support.
- deprecation wording: "- Ensure validator client uses non-deprecated beacon API attestation endpoints:"
Oct 31, 2025
Nimbusv25.9.2
Why this rating
- medium (mainnet); high (hoodi, sepolia, holesky): Nimbus v25.9.2 is a medium-urgency stability-oriented release for mainnet and high-urgency release for the Hoodi, Sepolia, and Holesky testnets, due to impending Fusaka forks on each.
Sep 26, 2025
Nimbusv25.9.1
Why this rating
- low (mainnet); high (hoodi, sepolia, holesky): Nimbus v25.9.1 is a low-urgency release for mainnet and high-urgency release for the Hoodi, Sepolia, and Holesky testnets, due to impending Fusaka forks on each.
- deprecation wording: "- Update the validator client to use non-deprecated publishBlockV2 pre-Electra:"
Sep 25, 2025
Nimbusv25.9.0
Why this rating
- low (all networks): Nimbus v25.9.0 is a low-urgency release which increases the resiliency and efficiency of block production.
- deprecation wording: "Furthermore, macOS amd64 releases have been deprecated and will be discontinued by October 2025."
Sep 2, 2025
Nimbusv25.7.1
Why this rating
- medium (all networks): Nimbus v25.7.1 is a medium-urgency release, fixing a potential syncing-related crash.
Jul 31, 2025
Nimbusv25.7.0
Why this rating
- low (all networks); medium (all networks): Nimbus v25.7.0 is a low-urgency release, except for usage of the validator client with non-Nimbus beacon nodes for which it's a medium-urgency release.
Jul 10, 2025
Nimbusv25.6.0
Why this rating
- low (all networks): Nimbus v25.6.0 is a low-urgency release.
- deprecation wording: "- Remove deprecated Eth1Data polling for deposits in favor of EIP6110:"
Jun 16, 2025
Nimbusv25.5.0
Why this rating
- low (all networks); high (all networks): Nimbus v25.5.0 does not alter the beacon node, is a low-urgency release for nodes which don't use the Nimbus validator client with a non-Nimbus BN, and a high-urgency release for nodes which do use t…
May 8, 2025
Nimbusv25.4.1
Why this rating
- high (mainnet): Nimbus v25.4.1 is a high-urgency release for Ethereum and Gnosis mainnets due to their Pectra hardforks.
Apr 26, 2025
Nimbusv25.4.0
Why this rating
- high (mainnet): Nimbus v25.4.0 is a high-urgency release for Ethereum and Gnosis mainnets due to their Pectra hardforks.
Apr 22, 2025
Nimbusv25.3.1
Why this rating
- low (all networks); high (all networks): Nimbus v25.3.1 is a low-urgency release except for the Hoodi testnet, for which it's a high-urgency release.
- performance wording: "- Improve block quarantine performance on forked chains:"
Mar 21, 2025
Nimbusv25.3.0
Why this rating
- low (all networks): Nimbus v25.3.0 is a low-urgency release except for the Gnosis Chiado testnet, for which it's a high-urgency release.
Mar 2, 2025
Nimbusv25.2.0
Why this rating
- low (mainnet); high (sepolia, holesky): Nimbus v25.2.0 is a low-urgency release for mainnet, but high-urgency release for Sepolia and Holesky due to Pectra-readiness for their upcoming forks.
Feb 13, 2025