Ethereum postpones Glamsterdam upgrade on Hoodi testnet over contract risk
Ethereum developers called off the Glamsterdam activation on the Hoodi testnet, scheduled for Oct. 26, after CoinDesk reported security concerns about how new gas rules could affect existing smart contracts. ChainSecurity said it found 13 real-world examples of contracts potentially affected by the gas changes and is coordinating responsible disclosure, per Cointelegraph. A planned gas limit increase to 200 million was also postponed.
2 independent publishers report it (copies of the same text count once); they may still rely on one underlying source. An official source would raise it.
Project updates topic · core coin ETH · 2 publishers
Recent project updates news
Three separate rule-based signals. None is the probability that the report is true. How they work →
Key facts
Attributed sources: CoinDesk Cointelegraph
ETH after this site detected it
- 5 minutes+0.18%vs BTC +0.08 pp
- 1 hour+0.24%vs BTC +0.11 pp
- 24 hours—Window not complete
Claims and open questions
What sources claim
- CoinDesk reported that developers postponed the Hoodi activation during Thursday's All Core Devs Execution meeting to investigate how EIP-8037, a gas accounting change, interacts with contracts already running on mainnet.
- CoinDesk reported that ChainSecurity's Oct. 13 analysis showed that, combined with EIP-8038, creating a new storage slot could require 110,020 gas when a separate allowance is exhausted, compared with 22,100 under the old rules.
- Cointelegraph reported that ChainSecurity identified 13 real-world examples of smart contracts potentially affected by Glamsterdam's gas changes and is coordinating responsible disclosure with affected projects.
Still unresolved
- When developers will reschedule the Hoodi activation and the accompanying increase of the testnet gas limit to 200 million, and what fix or mitigation they adopt, would be confirmed by an official All Core Devs statement or Ethereum Foundation notice.
- Whether any of the 13 examples flagged by ChainSecurity involve a major production protocol that is actually exploitable, beyond the demonstrated mechanism, would be confirmed by ChainSecurity's disclosure or affected-project statements.
Model-assisted explanation; citations, numbers and output format are checked. This is not independent semantic verification.
Source evidence
www.coindesk.com
Published 23/10/2026, 04:59 · Received 23/10/2026, 05:07
cointelegraph.com
Published 23/10/2026, 05:09 · Received 23/10/2026, 05:13
Original source titles remain in their source language. Full articles are not republished.
Market reaction after detection
Returns start at the sample closest to site detection (within the same minute up to 10 minutes later), using the same data source and quote currency. Actual sample times are shown; missing observations remain blank.
| Window | Return | BTC | Difference from BTC (pp) | Actual sampled interval / source |
|---|---|---|---|---|
| 5 minutes | +0.18% | +0.11% | +0.08 pp | 23/10/2026, 05:07 → 23/10/2026, 05:12 (UTC) Gate · USDT |
| 1 hour | +0.24% | +0.13% | +0.11 pp | 23/10/2026, 05:07 → 23/10/2026, 06:08 (UTC) Gate · USDT |
| 24 hours | — | — | — | Awaiting a complete valid window |
Historical market context
Research: hourly returns and BTC beta →
Closed hourly candles from the 30 days before this event observation. Different venues are kept separate.
| Metric | Value |
|---|---|
| Hourly coverage | 100.0% (720/720) |
| Median absolute 1h return | 0.19% |
| 99th percentile of absolute 1h returns | 1.46% |
| Historical hourly BTC beta | 1.19 (719 matched returns) |
OKX · USDT · Context as of 23/10/2026, 05:07 · Last included candle closed 23/10/2026, 05:00
Hourly descriptive statistics, not minute-move probabilities. Backfilled history never moves the observation cutoff above.
Event timeline
Source publication, receipt and analysis times are separate. All times UTC.
Source published: CoinDesk
Source received: CoinDesk
Event first detected by this site
Evidence record updated
Source published: Cointelegraph
Source received: Cointelegraph
Additional source received; evidence recalculated
English explanation generated
Latest content update
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