{"id":42132,"date":"2025-05-11T19:00:33","date_gmt":"2025-05-11T16:00:33","guid":{"rendered":"https:\/\/coinengineer.net\/blog\/?p=42132"},"modified":"2025-05-11T20:50:46","modified_gmt":"2025-05-11T17:50:46","slug":"ethereum-pectra-update-contains-a-critical-vulnerability","status":"publish","type":"post","link":"https:\/\/coinengineer.net\/blog\/ethereum-pectra-update-contains-a-critical-vulnerability\/","title":{"rendered":"Ethereum Pectra Update Contains a Critical Vulnerability!"},"content":{"rendered":"<p class=\"\" data-start=\"3574\" data-end=\"3821\">In the fast-paced world of crypto, innovation often walks hand-in-hand with new risks. Ethereum&#8217;s latest upgrade, <strong data-start=\"3688\" data-end=\"3698\">Pectra<\/strong>, is a double-edged sword \u2014 bringing advanced smart wallet features while exposing users to an unprecedented attack vector.<\/p>\n<p class=\"\" data-start=\"3823\" data-end=\"4015\">One message. That\u2019s all it takes for hackers to drain your entire wallet. A signed offchain message is now powerful enough to hand over control of your funds \u2014 no onchain transaction required.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_71 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/coinengineer.net\/blog\/ethereum-pectra-update-contains-a-critical-vulnerability\/#EIP-7702_The_Risky_New_Delegation_Mechanism\" title=\"EIP-7702: The Risky New Delegation Mechanism\">EIP-7702: The Risky New Delegation Mechanism<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/coinengineer.net\/blog\/ethereum-pectra-update-contains-a-critical-vulnerability\/#A_Stealth_Threat_Via_Innocent-Looking_Messages\" title=\"A Stealth Threat Via Innocent-Looking Messages\">A Stealth Threat Via Innocent-Looking Messages<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/coinengineer.net\/blog\/ethereum-pectra-update-contains-a-critical-vulnerability\/#Hardware_Wallets_Are_Not_Immune_Anymore\" title=\"Hardware Wallets Are Not Immune Anymore\">Hardware Wallets Are Not Immune Anymore<\/a><\/li><\/ul><\/nav><\/div>\n<h2 data-start=\"4017\" data-end=\"4065\"><span class=\"ez-toc-section\" id=\"EIP-7702_The_Risky_New_Delegation_Mechanism\"><\/span>EIP-7702: The Risky New Delegation Mechanism<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"4067\" data-end=\"4257\">Activated on May 7, 2025, Pectra\u2019s centerpiece <strong data-start=\"4114\" data-end=\"4126\">EIP-7702<\/strong> introduces a transaction type called SetCode, which allows users to <strong data-start=\"4195\" data-end=\"4232\">delegate control of their wallets<\/strong> via a simple signature.<\/p>\n<p class=\"\" data-start=\"4259\" data-end=\"4509\"><strong data-start=\"4259\" data-end=\"4273\">Arda Usman<\/strong>, a Solidity smart contract auditor, confirmed: <em>\u201cAn attacker can use this offchain signature to install malicious code into an externally owned account (EOA) and move ETH or tokens \u2014 without the user ever signing a transaction.\u201d<\/em><\/p>\n<p class=\"\" data-start=\"4511\" data-end=\"4633\">This feature effectively transforms user wallets into smart contracts, opening the door to silent yet devastating attacks.<\/p>\n<p data-start=\"4511\" data-end=\"4633\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-155606 \" src=\"https:\/\/coinmuhendisi.com\/blog\/wp-content\/uploads\/2025\/05\/ethereum-1024x504.webp\" alt=\"ethereum\" width=\"734\" height=\"361\" \/><\/p>\n<h2 data-start=\"4635\" data-end=\"4685\"><span class=\"ez-toc-section\" id=\"A_Stealth_Threat_Via_Innocent-Looking_Messages\"><\/span>A Stealth Threat Via Innocent-Looking Messages<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"4687\" data-end=\"4918\"><strong data-start=\"4687\" data-end=\"4705\">Yehor Rudytsia<\/strong>, an onchain researcher at Hacken, emphasized that this transaction type allows arbitrary code to be installed in wallets. Previously, such a change required an actual transaction; now, only a signature is enough.<\/p>\n<hr \/>\n<p data-start=\"4920\" data-end=\"5136\"><strong><em>You Might Be Interested In: <a href=\"https:\/\/coinengineer.net\/blog\/elon-musk-talks-about-the-name-of-a-new-memecoin\/\">Elon Musk Talks About the Name of a New Memecoin!<\/a><\/em><\/strong><\/p>\n<hr \/>\n<p class=\"\" data-start=\"4920\" data-end=\"5136\">This shift means phishing attempts, fake DApps, or Discord scams can now result in complete wallet takeovers. <em>\u201cWe believe this will become the most common attack vector following the Pectra upgrade,\u201d<\/em> Rudytsia warned.<\/p>\n<p class=\"\" data-start=\"5138\" data-end=\"5243\">Wallet applications that fail to correctly interpret transaction type <strong data-start=\"5208\" data-end=\"5216\">0x04<\/strong> are especially vulnerable.<\/p>\n<p data-start=\"5138\" data-end=\"5243\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-155608 \" src=\"https:\/\/coinmuhendisi.com\/blog\/wp-content\/uploads\/2025\/05\/ethereum-1-1024x728.webp\" alt=\"ethereum\" width=\"739\" height=\"525\" \/><\/p>\n<h2 data-start=\"5245\" data-end=\"5288\"><span class=\"ez-toc-section\" id=\"Hardware_Wallets_Are_Not_Immune_Anymore\"><\/span>Hardware Wallets Are Not Immune Anymore<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"\" data-start=\"5290\" data-end=\"5526\">The once-clear distinction between hot and cold wallets is fading. Rudytsia highlighted that <strong data-start=\"5383\" data-end=\"5403\">hardware wallets<\/strong> are now just as vulnerable if users unknowingly sign malicious messages: <em>\u201cOnce signed, all funds can be gone in a moment.\u201d<\/em><\/p>\n<p class=\"\" data-start=\"5528\" data-end=\"5555\">To stay safe, users should:<\/p>\n<ul>\n<li data-start=\"5559\" data-end=\"5608\">Never sign messages they do not fully understand.<\/li>\n<li data-start=\"5611\" data-end=\"5685\">Look out for delegation requests, especially those involving nonce values.<\/li>\n<li data-start=\"5688\" data-end=\"5782\">Be aware that some delegation signatures can be replayed on <strong data-start=\"5748\" data-end=\"5781\">any Ethereum-compatible chain<\/strong>.<\/li>\n<\/ul>\n<p class=\"\" data-start=\"5784\" data-end=\"5934\">While multisig wallets offer more robust protection, single-key wallets \u2014 including hardware ones \u2014 must adopt new safeguards to prevent exploitation.<\/p>\n<hr \/>\n<p data-start=\"5784\" data-end=\"5934\"><em>You can also freely share your thoughts and comments about the topic in the comment section. Additionally, don\u2019t forget to follow us on our\u00a0<a href=\"https:\/\/t.me\/coinengineernews\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><strong>Telegram,\u00a0<\/strong><\/a><a href=\"https:\/\/www.youtube.com\/@CoinEngineer\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><strong>YouTube<\/strong><\/a>,\u00a0and\u00a0<a href=\"https:\/\/twitter.com\/coinengineers\" target=\"_blank\" rel=\"nofollow noopener\"><strong>Twitter<\/strong><\/a>\u00a0channels for the latest\u00a0<a title=\"News\" href=\"https:\/\/coinengineer.net\/blog\/news\/\" data-internallinksmanager029f6b8e52c=\"7\">news<\/a>\u00a0and updates.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the fast-paced world of crypto, innovation often walks hand-in-hand with new risks. Ethereum&#8217;s latest upgrade, Pectra, is a double-edged sword \u2014 bringing advanced smart wallet features while exposing users to an unprecedented attack vector. One message. That\u2019s all it takes for hackers to drain your entire wallet. A signed offchain message is now powerful<\/p>\n","protected":false},"author":28,"featured_media":36963,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,657,2],"tags":[5476,15625,13807,2267,15623,5943,106,105,12365,99,360,15620,11705,15621,15622,134,13514,15624],"class_list":["post-42132","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-crypto-news","category-en","category-news","tag-blockchain-security","tag-cross-chain-risk","tag-crypto-attack","tag-crypto-wallet","tag-defi-risk","tag-eip-7702","tag-eth","tag-ethereum","tag-ethereum-upgrade","tag-hardware-wallet","tag-multisig-wallet","tag-offchain-signature","tag-pectra","tag-phishing-risk","tag-signature-delegation","tag-smart-contract","tag-wallet-security","tag-web3-threat"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Ethereum Pectra Update Contains a Critical Vulnerability! - Coin Engineer<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/coinengineer.net\/blog\/ethereum-pectra-update-contains-a-critical-vulnerability\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ethereum Pectra Update Contains a Critical Vulnerability! - Coin Engineer\" \/>\n<meta property=\"og:description\" content=\"In the fast-paced world of crypto, innovation often walks hand-in-hand with new risks. Ethereum&#8217;s latest upgrade, Pectra, is a double-edged sword \u2014 bringing advanced smart wallet features while exposing users to an unprecedented attack vector. One message. That\u2019s all it takes for hackers to drain your entire wallet. 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