This is a security fix release and is recommended for all users. It resolves a p2p vulnerability, and the fix is taken from the upstream geth client.

Some Other Changes are:

• miner: add dynamic gas limit adjustment by @cffls in #1979
• mainnet: Added Override StateSync Records Range by @pratikspatil024 in #1982
• v2.5.7 by @pratikspatil024 in #1984

Full Changelog: v2.5.6...v2.5.7

This version fixes an issue where bor is stuck at mainnet block 81,558,640.

What's Changed

• miner: add dynamic gas limit adjustment by @cffls in #1979
• mainnet: Added Override StateSync Records Range by @pratikspatil024 in #1982

Full Changelog: v2.5.6...v2.5.7-beta2

This release adds a new feature that allows block producers to dynamically adjust block gas limits to help stabilize base fees within a target range. When base fee rises above the target, gas limit increases to add supply. When base fee falls below the target, gas limit decreases to reduce supply.

Full Changelog: v2.5.6...v2.5.7-beta

Bor v2.5.6 is an important release containing Dandeli hard fork on mainnet Network. The HF is scheduled on block number 81424000 which is estimated to be mined at 9th Jan 2026, 2 PM UTC. It adjusts the gas target calculations to mitigate gas price spikes and to increase effective network throughput.

What's Changed

• backport by @marcello33 in #1919
• Fix parallel evm revert by @avalkov in #1918
• p2p: added functionality to temporarily ban peers to prevent connections by @pratikspatil024 in #1922
• chore: bump kurtosis-pos by @kamuikatsurgi in #1923
• backport v2.5.4 by @pratikspatil024 in #1926
• fix(miner): delete pending task after successful block sealing to prevent node stall by @kamuikatsurgi in #1929
• v2.5.5 release by @kamuikatsurgi in #1936
• chore: backport master to develop by @kamuikatsurgi in #1937
• Remove Recommit and Fix Parent Actual Time track on Prepare by @lucca30 in #1938
• chore: update deps by @kamuikatsurgi in #1939
• V2.5.6 candidate by @lucca30 in #1941
• Backport master to develop by @lucca30 in #1942
• Revert "V2.5.6 candidate" by @pratikspatil024 in #1947
• Revert "Backport master to develop" by @pratikspatil024 in #1948
• fix: ignore invalid signer error for specific block range by @avalkov in #1944
• fix(miner): track pending work using block number to avoid duplicate block building work by @kamuikatsurgi in #1943
• fix(rpc): maxFeePerGas and maxPriorityFeePerGas for StateSyncTx type by @kamuikatsurgi in #1952
• chore: bump kurtosis-pos by @kamuikatsurgi in #1954
• Fix missing chain validator service setup by @Raneet10 in #1957
• fix(api): traceBlock by @kamuikatsurgi in #1959
• Dandeli HF: modify block gas target calculations by @manav2401 in #1968
• v2.5.6 stable release by @pratikspatil024 in #1949

Full Changelog: v2.5.5...v2.5.6

Bor v2.5.6-beta6 is an important release containing Dandeli hard fork only on Amoy Network. The HF is scheduled on block number 31890000 which is estimated to be mined at 7th Jan 2026, 12 PM UTC. It adjusts the gas target calculations to mitigate gas price spikes and to increase effective network throughput.

What's Changed

• Dandeli HF: modify block gas target calculations by @manav2401 in #1968

Full Changelog: v2.5.6-beta5...v2.5.6-beta6

What's Changed

• fix(rpc): maxFeePerGas and maxPriorityFeePerGas for StateSyncTx type by @kamuikatsurgi in #1952
• chore: bump kurtosis-pos by @kamuikatsurgi in #1954
• Fix missing chain validator service setup by @Raneet10 in #1957
• fix(api): traceBlock by @kamuikatsurgi in #1959

Full Changelog: v2.5.6-beta4...v2.5.6-beta5

Description

This release contains a fix in the miner module, which prevents block producers from sealing the same block twice.

What's Changed

• backport by @marcello33 in #1919
• Fix parallel evm revert by @avalkov in #1918
• p2p: added functionality to temporarily ban peers to prevent connections by @pratikspatil024 in #1922
• chore: bump kurtosis-pos by @kamuikatsurgi in #1923
• backport v2.5.4 by @pratikspatil024 in #1926
• fix(miner): delete pending task after successful block sealing to prevent node stall by @kamuikatsurgi in #1929
• v2.5.5 release by @kamuikatsurgi in #1936
• chore: backport master to develop by @kamuikatsurgi in #1937
• Remove Recommit and Fix Parent Actual Time track on Prepare by @lucca30 in #1938
• chore: update deps by @kamuikatsurgi in #1939
• fix: ignore invalid signer error for specific block range by @avalkov in #1944
• fix(miner): track pending work using block number to avoid duplicate block building work by @kamuikatsurgi in #1943

Full Changelog: v2.5.5...v2.5.6-beta4

What's Changed

• v2.5.5 release by @kamuikatsurgi in #1936
• V2.5.6 candidate by @lucca30 in #1941

Full Changelog: v2.5.5...v2.5.6-beta3

This release handles some big block intervals we observed on the network due to consensus handling on recommits.

What's Changed

• backport by @marcello33 in #1919
• Fix parallel evm revert by @avalkov in #1918
• p2p: added functionality to temporarily ban peers to prevent connections by @pratikspatil024 in #1922
• chore: bump kurtosis-pos by @kamuikatsurgi in #1923
• backport v2.5.4 by @pratikspatil024 in #1926
• fix(miner): delete pending task after successful block sealing to prevent node stall by @kamuikatsurgi in #1929
• v2.5.5 release by @kamuikatsurgi in #1936
• chore: backport master to develop by @kamuikatsurgi in #1937
• Remove Recommit and Fix Parent Actual Time track on Prepare by @lucca30 in #1938
• chore: update deps by @kamuikatsurgi in #1939

Full Changelog: v2.5.5...v2.5.6-beta2

This release handles some big block intervals we observed on the network due to consensus handling on recommits.

What's Changed

• backport by @marcello33 in #1919
• Fix parallel evm revert by @avalkov in #1918
• p2p: added functionality to temporarily ban peers to prevent connections by @pratikspatil024 in #1922
• chore: bump kurtosis-pos by @kamuikatsurgi in #1923
• backport v2.5.4 by @pratikspatil024 in #1926
• fix(miner): delete pending task after successful block sealing to prevent node stall by @kamuikatsurgi in #1929
• v2.5.5 release by @kamuikatsurgi in #1936
• chore: backport master to develop by @kamuikatsurgi in #1937
• Remove Recommit and Fix Parent Actual Time track on Prepare by @lucca30 in #1938
• chore: update deps by @kamuikatsurgi in #1939

Full Changelog: v2.5.5...v2.5.6-beta