Offchain Labs discloses two serious security vulnerabilities in Optimism OP Stack
Source Fxstreet
- Offchain Labs team disclosed two serious security vulnerabilities in Optimism to OP Labs, occurred on March 22.
- The vulnerabilities were found in Optimism fraud proof system deployed on the testnet.
- OP wiped out nearly 2% of its value in the past day.
Offchain Labs announced in a tweet on X and on a Medium blog that the firm identified two serious security vulnerabilities in Optimism’s OP Stack. The tweet explains that these were identified in Optimism’s fraud proof system deployed on the testnet.
Optimism Stack security vulnerabilities
Offchain Labs informed market participants that on March 22 the team disclosed two serious security vulnerabilities to the OP Labs team. The issues were identified in Optimism fraud proof system deployed on OP’s testnet.
The blockchain research firm provided the OP Labs team with demonstration exploit code for the attacks. The team at OP confirmed the validity of these issues on March 25 and these were addressed. On April 25, Optimism updated its testnet and the team at Offchain Labs is disclosing this for the first time.
The OP Stack could have faced an attack from a malicious party and this could force the Stack to accept a fraudulent chain history. This could prevent Optimism from accepting a correct chain history.
Today, we disclosed two serious vulnerabilities in the recently released OP Stack fraud proofs.
— Offchain Labs (@OffchainLabs) April 26, 2024
We coordinated closely with the OP Labs team on this disclosure. We’re all on team Ethereum, and happy to lend resources to make Ethereum safer for everyone.https://t.co/vC4SWBdTuZ
If the chain was attacked and the vulnerabilities were not identified and addressed, Optimism would have relied on an emergency intervention by the security council. Offchain Labs is the research firm behind Arbitrum, a competitor for Layer 2 chain Optimism. The firm says,
We’re all on team Ethereum, and happy to lend resources to make Ethereum safer for everyone.
Optimism told FXStreet,
Getting eyes on our testnet code is a critical part of the development process. We've shared our initial audit contest findings, as well as the details of Offchain Lab's findings in this blog post.
At the time of writing, OP price is at $2.35, down over 2%, on Binance.
Disclaimer: For information purposes only. Past performance is not indicative of future results.
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Ethereum Price Slips Lower — $3,000 Looms as the Key BattlegroundEthereum is attempting to recover from a $3,026 low but remains below $3,200 and the 100-hour SMA, with a bearish trend line near $3,175 capping rebounds as bulls need a clean break above $3,200 to target $3,250–$3,400, while a drop below $3,050 risks a retest of $3,000 and $2,940.
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Analysts predict Bitcoin may face further declines towards the $70,000 mark if the Bank of Japan raises interest rates as expected.
Bitcoin Slides 5% as Sellers Lean In — Can BTC Reclaim $88,000?Bitcoin has dropped back below $88,000 after rolling over from $90,500, with price still trading under the 100-hour Simple Moving Average.
The sell-off found a floor at $85,151, and BTC is now consolidating near that base, but rebounds are facing pressure from a bearish trend line around $89,000.
Bulls need to retake $88,000–$89,000 to ease downside risk; failure to do so keeps $85,500–$85,000 and then $83,500 in play, with $80,000 as the deeper “line in the sand.”
Bitcoin (BTC) is back in damage-control mode after a sharp pullback wiped out recent gains. The price failed to reclaim the $90,000–$90,500 band, rolled over, and slid through $88,500 before briefly dipping under $87,000. Buyers did show up around $85,000, but the rebound so far looks more like stabilization than a clear trend reversal.
Bitcoin dips hard, finds a bid near $85,000（h3）
BTC’s latest move lower began when it couldn’t build follow-through above $90,000 and $90,500. Once that upside stalled, sellers took control and pushed price down through $88,500.
The slide accelerated enough to spike below $87,000, but the market didn’t free-fall. Bulls defended the $85,000 zone, printing a low at $85,151. Since then, Bitcoin has been consolidating below the 23.6% Fibonacci retracement of the drop from the $93,560 swing high to the $85,151 low — a clue that the bounce is still shallow and that sellers haven’t fully backed off yet.
Structurally, BTC is still on the back foot:
It’s trading below $88,000, and
It remains below the 100-hour Simple Moving Average, keeping short-term trend pressure pointed downward.
Resistance is layered, and $89,000 is the problem area（h3）
If bulls try to turn this into a recovery, they’ll have to climb through multiple ceilings in quick succession.
First, BTC faces resistance around $87,150, followed by a more meaningful barrier near $87,500. From there, the market’s attention snaps back to $88,000 — the level BTC just lost and now needs to reclaim.
A close back above $88,000 would improve the tone, but it doesn’t solve the bigger issue: there’s a bearish trend line on the hourly BTC/USD chart (Kraken feed) with resistance near $89,000, which also lines up with the next technical hurdle.
If BTC can push through $89,000 and hold, the rebound could extend toward $90,000, with follow-through targets at $91,000 and $91,500. But until price clears that $88,000–$89,000 zone, rallies are at risk of being sold rather than chased.
If BTC fails to reclaim resistance, the downside path is clear（h3）
The near-term bear case is simple: if Bitcoin can’t climb back above the $87,000 area and keep traction, sellers may attempt another leg lower.
Support levels line up like this:
Immediate support: $85,500
First major support: $85,000
Next support: $83,500
Then $82,500 in the near term
Below that, the major “don’t break this” level is still $80,000. If BTC slips under $80,000, the risk of acceleration to the downside increases significantly — not because it’s magic, but because it’s the kind of psychological and structural level that tends to trigger forced de-risking.
Indicators: momentum still leans bearish（h3）
The intraday indicators aren’t offering much comfort yet:
Hourly MACD is losing pace in the bearish zone.
Hourly RSI remains below 50, suggesting sellers still have the upper hand on short timeframes.
So while the $85,000 defense held for now, the market hasn’t flipped bullish — it’s just stopped bleeding.
Bitcoin has dropped back below $88,000 after rolling over from $90,500, with price still trading under the 100-hour Simple Moving Average.
The sell-off found a floor at $85,151, and BTC is now consolidating near that base, but rebounds are facing pressure from a bearish trend line around $89,000.
Bulls need to retake $88,000–$89,000 to ease downside risk; failure to do so keeps $85,500–$85,000 and then $83,500 in play, with $80,000 as the deeper “line in the sand.”
Bitcoin (BTC) is back in damage-control mode after a sharp pullback wiped out recent gains. The price failed to reclaim the $90,000–$90,500 band, rolled over, and slid through $88,500 before briefly dipping under $87,000. Buyers did show up around $85,000, but the rebound so far looks more like stabilization than a clear trend reversal.
Bitcoin dips hard, finds a bid near $85,000（h3）
BTC’s latest move lower began when it couldn’t build follow-through above $90,000 and $90,500. Once that upside stalled, sellers took control and pushed price down through $88,500.
The slide accelerated enough to spike below $87,000, but the market didn’t free-fall. Bulls defended the $85,000 zone, printing a low at $85,151. Since then, Bitcoin has been consolidating below the 23.6% Fibonacci retracement of the drop from the $93,560 swing high to the $85,151 low — a clue that the bounce is still shallow and that sellers haven’t fully backed off yet.
Structurally, BTC is still on the back foot:
It’s trading below $88,000, and
It remains below the 100-hour Simple Moving Average, keeping short-term trend pressure pointed downward.
Resistance is layered, and $89,000 is the problem area（h3）
If bulls try to turn this into a recovery, they’ll have to climb through multiple ceilings in quick succession.
First, BTC faces resistance around $87,150, followed by a more meaningful barrier near $87,500. From there, the market’s attention snaps back to $88,000 — the level BTC just lost and now needs to reclaim.
A close back above $88,000 would improve the tone, but it doesn’t solve the bigger issue: there’s a bearish trend line on the hourly BTC/USD chart (Kraken feed) with resistance near $89,000, which also lines up with the next technical hurdle.
If BTC can push through $89,000 and hold, the rebound could extend toward $90,000, with follow-through targets at $91,000 and $91,500. But until price clears that $88,000–$89,000 zone, rallies are at risk of being sold rather than chased.
If BTC fails to reclaim resistance, the downside path is clear（h3）
The near-term bear case is simple: if Bitcoin can’t climb back above the $87,000 area and keep traction, sellers may attempt another leg lower.
Support levels line up like this:
Immediate support: $85,500
First major support: $85,000
Next support: $83,500
Then $82,500 in the near term
Below that, the major “don’t break this” level is still $80,000. If BTC slips under $80,000, the risk of acceleration to the downside increases significantly — not because it’s magic, but because it’s the kind of psychological and structural level that tends to trigger forced de-risking.
Indicators: momentum still leans bearish（h3）
The intraday indicators aren’t offering much comfort yet:
Hourly MACD is losing pace in the bearish zone.
Hourly RSI remains below 50, suggesting sellers still have the upper hand on short timeframes.
So while the $85,000 defense held for now, the market hasn’t flipped bullish — it’s just stopped bleeding.
The Senate Banking Committee has postponed cryptocurrency market structure hearings until 2026, citing ongoing bipartisan negotiations.
