• Press Releases
    • Submit a press release
    • Read All
  • Contact us
Advertise
Bitcoinist.com
No Result
View All Result
  • Bitcoin
    • News
    • Price
    • Businesses
    • Acceptance
    • Technology
    • Investment
    • Regulation
    • Reviews
    • All Bitcoin News
  • Altcoins
    • News
    • Price
    • Ethereum
    • Ripple
    • Litecoin
    • EOS
    • NAGA
    • All Altcoin News
  • Tech
    • Blockchain
    • Security
    • FinTech
    • Price
      • Bitcoin Price
      • Ethereum Price
      • Binance Coin Price
      • Litecoin Price
  • Industry
    • Industry News
    • Press Releases
  • How to
    • Buy gift cards/mobile Top Ups with Cryptos
    • What Is Bitcoin?
    • Best Bitcoin Wallet
    • Bitcoin vs Ethereum
    • Why Use Blockchain Technology?
    • Bitcoin Cash ABC vs. Bitcoin Cash SV
    • How to Buy Cryptocurrency
    • How to do Crypto Gambling
      • Crypto Casinos
        • Ethereum Casinos
        • Solana Casinos
        • LiteCoin Casinos
        • DogeCoin Casinos
        • Live Crypto Casinos
        • New Casinos
        • Instant Withdrawal Casinos
        • Cash App Casinos
        • No KYC Casinos
        • VPN Casinos
        • Offshore Casinos
          • Crypto Casinos IT
          • Crypto Casinos ES
            • All Guides
          • Crypto Casinos JP
          • Crypto Casinos SG
          • Crypto Casinos MY
          • Crypto Casinos KR
          • No GAMSTOP Casinos in UK
          • No Cruks Casinos NL
      • Crypto Betting
        • No ID sportsbooks
    • Play Crypto Games
      • Crypto Poker
      • Crypto Slots
      • Crypto Blackjack
      • Crypto Crash Gambling
        • Aviator Sites
      • Plinko
    • Bitcoin Mining
    • Best Bitcoin Brokers
    • Best Bitcoin Forex Brokers
    • How To Earn Bitcoin
    • What is Facebook Libra?
    • Ripple and XRP: The Complete Guide
  • Events
  • Play Games
Breaking News: Is The Approval Of Crypto ETFs At Risk? SEC Operations Frozen By Gov. Shutdown
  • Bitcoin
    • News
    • Price
    • Businesses
    • Acceptance
    • Technology
    • Investment
    • Regulation
    • Reviews
    • All Bitcoin News
  • Altcoins
    • News
    • Price
    • Ethereum
    • Ripple
    • Litecoin
    • EOS
    • NAGA
    • All Altcoin News
  • Tech
    • Blockchain
    • Security
    • FinTech
    • Price
      • Bitcoin Price
      • Ethereum Price
      • Binance Coin Price
      • Litecoin Price
  • Industry
    • Industry News
    • Press Releases
  • How to
    • Buy gift cards/mobile Top Ups with Cryptos
    • What Is Bitcoin?
    • Best Bitcoin Wallet
    • Bitcoin vs Ethereum
    • Why Use Blockchain Technology?
    • Bitcoin Cash ABC vs. Bitcoin Cash SV
    • How to Buy Cryptocurrency
    • How to do Crypto Gambling
      • Crypto Casinos
        • Ethereum Casinos
        • Solana Casinos
        • LiteCoin Casinos
        • DogeCoin Casinos
        • Live Crypto Casinos
        • New Casinos
        • Instant Withdrawal Casinos
        • Cash App Casinos
        • No KYC Casinos
        • VPN Casinos
        • Offshore Casinos
          • Crypto Casinos IT
          • Crypto Casinos ES
            • All Guides
          • Crypto Casinos JP
          • Crypto Casinos SG
          • Crypto Casinos MY
          • Crypto Casinos KR
          • No GAMSTOP Casinos in UK
          • No Cruks Casinos NL
      • Crypto Betting
        • No ID sportsbooks
    • Play Crypto Games
      • Crypto Poker
      • Crypto Slots
      • Crypto Blackjack
      • Crypto Crash Gambling
        • Aviator Sites
      • Plinko
    • Bitcoin Mining
    • Best Bitcoin Brokers
    • Best Bitcoin Forex Brokers
    • How To Earn Bitcoin
    • What is Facebook Libra?
    • Ripple and XRP: The Complete Guide
  • Events
  • Play Games
Bitcoinist.com
No Result
View All Result
Breaking News: Is The Approval Of Crypto ETFs At Risk? SEC Operations Frozen By Gov. Shutdown
Monero news

18 Block Reorg Slams Monero, Erasing 36 Minutes Of Blockchain

Jake Simmons
by Jake Simmons
2 weeks ago
·
Posted in Crypto News
Trusted Editorial content, reviewed by leading industry experts and seasoned editors. Ad Disclosure

Monero’s privacy chain endured its deepest-ever chain reorganization in the last 24 hours, when 18 consecutive blocks were replaced, briefly “rewriting” roughly 36 minutes of ledger history and invalidating about 118 already-confirmed transactions. Multiple independent monitors flagged the event late Sunday into Monday, describing a rollback spanning block heights 3,499,659 through 3,499,676 before nodes converged on a new best chain. With Monero targeting two-minute blocks, an 18-block reorg translates to ~36 minutes of history—an extraordinary depth for a mature proof-of-work network.

Monero Hit By Record 18 Block Reorg

“The attack against Monero is back. Hours ago XMR experienced an 18-block reorg. If you accept XMR make sure to wait for more than the usual 10 confs,” warned independent monitor OrangeFren as alerts circulated across crypto social channels. The post, amplified by several industry accounts, captured the immediate operational takeaway for merchants and services: raise confirmation thresholds until conditions normalize.

Related Reading: Dogecoin Network Gears Up Against Upcoming Attack: Here’s How

The incident comes a month after the controversial AI-oriented project Qubic claimed to have marshaled a majority of Monero’s hashrate, a campaign that coincided with a six-block reorg in August and led to temporary deposit suspensions at some exchanges. Security researchers at the time cautioned that the August event did not, by itself, prove sustained 51% dominance—streaks of mining “luck” can produce short, probabilistic reorganizations—but they also warned that persistent hashrate concentration raises the ceiling on how deep such reorgs can go. Monday’s 18-block episode materially raises that ceiling.

Community voices reacted with a mix of alarm and realism. SlowMist founder Yu Xian commented via X: “If no one in the Monero community takes the issue of block reorganization seriously, then this Sword of Damocles will always hang over Monero’s head… It may not necessarily carry out a double-spend attack, but having this capability… It doesn’t even have to strictly exceed 51% of the hash power…”

Qubic founder Sergey Ivancheglo, who is known by the alias “Come-from-Beyond”, posted via X: “Monero will stay because Qubic wanted it to stay.”

#Monero will stay because #Qubic wanted it to stay.https://t.co/49MZzF5WaI pic.twitter.com/qd7wPVoDOu

— Come-from-Beyond (@c___f___b) September 14, 2025

At a technical level, a chain reorg occurs when two valid histories compete and the network ultimately converges on the one with the most accumulated proof-of-work, discarding the other and any transactions exclusive to it. In Monero’s design, two-minute target block intervals and dynamic block sizing aim to keep throughput smooth while preserving privacy primitives like ring signatures and stealth addresses.

Related Reading: Monero Eyes ‘Detective Mining’ Defense After Qubic Attack

In practice, however, a miner or pool with outsized hashpower can—at least in bursts—privately extend a side chain and then release it, “out-working” the public tip and forcing nodes to reorganize. That is what appears to have happened here, with a depth that exceeded the de facto 10-confirmation comfort zone commonly used by wallets and exchanges.

The August–September sequence has re-opened a contentious debate inside Monero about defenses. Proposals span the spectrum: “rolling 10-block checkpoints” that finalize recent blocks to cap reorg depth; adopting elements akin to Dash’s ChainLocks to bolt on a finality layer; “detective mining” incentives to counter selfish-mining strategies at the pool level; and even merge-mining concepts that would piggyback Monero’s security on a larger PoW base.

Each trade-off is sharp: checkpoints and ChainLocks introduce degrees of centralization or new trust assumptions, while pool-level changes may be unevenly adopted. The community has not yet coalesced around a specific fix, but the urgency has unmistakably increased.

Markets treated the event with surprising resilience. Within hours, XMR rallied between roughly 5% and 7%, trading above $300 on some venues.

Monero price
XMR price, 1-week chart | Source: XMRUSDT on TradingView.com
Featured image created with DALL.E, chart from TradingView.com
Editorial Process for bitcoinist is centered on delivering thoroughly researched, accurate, and unbiased content. We uphold strict sourcing standards, and each page undergoes diligent review by our team of top technology experts and seasoned editors. This process ensures the integrity, relevance, and value of our content for our readers.
ShareTweetShareShare

Sign Up for Our Newsletter!

For updates and exclusive offers enter your email.

I consent to my submitted data being collected and stored.
Jake Simmons

Jake Simmons

Follow

Jake Simmons has been a Bitcoin enthusiast since 2016. Ever since he heard about Bitcoin, he has been studying the topic every day and trying to share his knowledge with others. His goal is to contribute to Bitcoin's financial revolution, which will replace the fiat money system. Besides BTC and crypto, Jake studied Business Informatics at a university. After graduation in 2017, he has been working in the blockchain and crypto sector. You can follow Jake on Twitter at @realJakeSimmons.

Full Profile

Related Posts

Next Crypto to Explode Live News Today: Timely Insights for Chart Sniffers (October 6)

Next Crypto to Explode Live News Today: Timely Insights for Chart Sniffers (October 6)

14 minutes ago
Bitcoin Hyper ($HYPER) Live News Today: Latest Insights for Bitcoin Maxis (October 6)

Bitcoin Hyper ($HYPER) Live News Today: Latest Insights for Bitcoin Maxis (October 6)

14 minutes ago
stablecoins

A New Era Of Fair Finance? GENIUS Act, Stablecoins Could End Bank Exploitation, Expert Says

1 hour ago
Bitcoin Breaks $125K ATH as Uptober Sets In and Bitcoin Hyper’s $21.6M Presale Soars

Bitcoin Breaks $125K ATH as Uptober Sets In and Bitcoin Hyper’s $21.6M Presale Soars

2 hours ago
Bitcoin

Blockchain Earnings Take A Dip — 16% Drop In Just 1 Month: Report

18 hours ago
FTX

FTX’s Sam Bankman-Fried Calls Handing Firm Over To New CEO ‘His Biggest Mistake’ — Details

1 day ago

Premium Sponsors

Press Releases

  • The Quiet Market Shift Investors Might Be Missing: How Tapzi Is Challenging Institutional Favorites

    The Quiet Market Shift Investors Might Be Missing: How...

    3 days ago
  • Investors Search for Long-Term Upside in This Under-$0.01 Crypto of 2025 Tapzi

    Investors Search for Long-Term Upside in This Under-$0.01...

    3 days ago
  • MoonBull Presale Explodes with over 11,800% Projected ROI as Uptober Sends the Market Soaring

    MoonBull Presale Explodes with over 11,800% Projected ROI...

    3 days ago
  • 狗狗幣引領『Uptober』Meme...

    3 days ago
  • ตัวละคร Snorter ขนฟูโต้คลื่นบนเซิร์ฟบอร์ดสีชมพู

    จับตา Uptober!...

    4 days ago

Bitcoin news portal providing breaking news, guides, price analysis about decentralized digital money & blockchain technology.

Bitcoin

  • News
  • Price
  • Businesses
  • Acceptance
  • Technology
  • Investment
  • Regulation
  • Reviews

Altcoins

  • News
  • Price
  • Ethereum
  • Ripple
  • Litecoin
  • EOS

Categories

  • Blockchain
  • Security
  • FinTech
  • Technology
  • Trending
  • Breaking News
  • Press Releases
  • How to

About Us

  • Advertise
  • Contact us
  • Editorial Policy
  • Privacy Policy
© 2025 Bitcoinist.com. All Rights Reserved.
  • Bitcoin
    • News
    • Price
    • Businesses
    • Acceptance
    • Technology
    • Investment
    • Regulation
    • Reviews
    • All Bitcoin News
  • Altcoins
    • News
    • Price
    • Ethereum
    • Ripple
    • Litecoin
    • EOS
    • NAGA
    • All Altcoin News
  • Tech
    • Blockchain
    • Security
    • FinTech
    • Price
      • Bitcoin Price
      • Ethereum Price
      • Binance Coin Price
      • Litecoin Price
  • Industry
    • Industry News
    • Press Releases
  • How to
    • Buy gift cards/mobile Top Ups with Cryptos
    • What Is Bitcoin?
    • Best Bitcoin Wallet
    • Bitcoin vs Ethereum
    • Why Use Blockchain Technology?
    • Bitcoin Cash ABC vs. Bitcoin Cash SV
    • How to Buy Cryptocurrency
    • How to do Crypto Gambling
      • Crypto Casinos
      • Crypto Betting
    • Play Crypto Games
      • Crypto Poker
      • Crypto Slots
      • Crypto Blackjack
      • Crypto Crash Gambling
      • Plinko
    • Bitcoin Mining
    • Best Bitcoin Brokers
    • Best Bitcoin Forex Brokers
    • How To Earn Bitcoin
    • What is Facebook Libra?
    • Ripple and XRP: The Complete Guide
  • Events
  • Play Games
Advertise

© 2025 Bitcoinist. All Rights Reserved.

This website uses cookies. By continuing to use this website you are giving consent to cookies being used. Visit our Privacy Center or Cookie Policy.