{"id":505487,"date":"2025-11-03T20:30:16","date_gmt":"2025-11-03T20:30:16","guid":{"rendered":"https:\/\/cryptoslate.com\/?p=505487"},"modified":"2025-11-03T16:33:39","modified_gmt":"2025-11-03T16:33:39","slug":"how-11-audits-couldnt-stop-balancers-128-million-hack-redefining-defi-risks","status":"publish","type":"post","link":"https:\/\/cryptoslate.com\/how-11-audits-couldnt-stop-balancers-128-million-hack-redefining-defi-risks\/","title":{"rendered":"How 11 audits couldn&#8217;t stop Balancer&#8217;s $128 million hack redefining DeFi risks"},"content":{"rendered":"<p>For years, <a href=\"https:\/\/cryptoslate.com\/coins\/balancer\/\">Balancer<\/a> stood as one of DeFi's most reliable institutions, a protocol that had survived several bear markets, audits, and integrations without scandal.<\/p>\n<p>However, that credibility collapsed on Nov. 3, when the blockchain security firm PeckShield reported that Balancer and several of its forks were under an active exploit spreading across multiple chains.<\/p>\n<p>Within hours, more than $128 million was gone, leaving a trail of drained pools, frozen protocols, and shaken investors.<\/p>\n<p>PeckShield data showed the platform's protocol on <a href=\"https:\/\/cryptoslate.com\/coins\/ethereum\/\">Ethereum<\/a> suffered the heaviest losses of about $100 million. Berachain followed with $12.9 million, while <a href=\"https:\/\/cryptoslate.com\/coins\/arbitrum\/\">Arbitrum<\/a>, Base, and smaller forks such as <a href=\"https:\/\/cryptoslate.com\/coins\/sonic\/\">Sonic<\/a>, Optimism, and <a href=\"https:\/\/cryptoslate.com\/coins\/polygon\/\">Polygon<\/a> recorded lower but still significant thefts.<\/p>\n<figure id=\"attachment_505565\" aria-describedby=\"caption-attachment-505565\" style=\"width: 284px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-505565\" src=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/G40inlqbcAAOihW.png\" alt=\"Balancer Hack\" width=\"284\" height=\"759\" srcset=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/G40inlqbcAAOihW.png 284w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/G40inlqbcAAOihW-112x300.png 112w\" sizes=\"(max-width: 284px) 100vw, 284px\" \/><figcaption id=\"caption-attachment-505565\" class=\"wp-caption-text\">Total Funds Stolen from Balancer Hack (Source: Peckshield)<\/figcaption><\/figure>\n<p>As the drain unfolded, Balancer acknowledged a \u201cpotential exploit impacting Balancer v2 pools,\u201d stating that its engineering and security teams were investigating the issue with high priority.<\/p>\n<p>However, the acknowledgment did little to slow withdrawals across integrators and forks.<\/p>\n<p>By the end of the day, DeFiLlama data showed that Balancer\u2019s total value locked (TVL) had decreased by 46% to approximately $422 million from $770 million as of press time.<\/p>\n<figure id=\"attachment_505570\" aria-describedby=\"caption-attachment-505570\" style=\"width: 1596px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-505570\" src=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/Screenshot-2025-11-03-170817.jpg\" alt=\"Balancer DeFi Hack\" width=\"1596\" height=\"424\" srcset=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/Screenshot-2025-11-03-170817.jpg 1596w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/Screenshot-2025-11-03-170817-300x80.jpg 300w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/Screenshot-2025-11-03-170817-1024x272.jpg 1024w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/Screenshot-2025-11-03-170817-768x204.jpg 768w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/Screenshot-2025-11-03-170817-1536x408.jpg 1536w\" sizes=\"(max-width: 1596px) 100vw, 1596px\" \/><figcaption id=\"caption-attachment-505570\" class=\"wp-caption-text\">Balancer DeFi Hack (Source: DeFiLlama)<\/figcaption><\/figure>\n<h2>What happened?<\/h2>\n<p>Preliminary forensics from blockchain security firm Phalcon <a href=\"https:\/\/x.com\/phalcon_xyz\/status\/1985302779263643915?s=46\">indicated<\/a> that the attacker targeted Balancer Pool Tokens (BPT), which represent user shares in liquidity pools.<\/p>\n<p>According to the firm, the vulnerability stemmed from how Balancer calculated pool prices during batch swaps. By manipulating that logic, the exploiter distorted the internal price feed, creating an artificial imbalance that let them withdraw tokens before the system corrected itself.<\/p>\n<figure id=\"attachment_505566\" aria-describedby=\"caption-attachment-505566\" style=\"width: 1346px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-505566\" src=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/G402PrOa8AARjB0.jpg\" alt=\"How Attacker Exploited Balancer Code\" width=\"1346\" height=\"380\" srcset=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/G402PrOa8AARjB0.jpg 1346w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/G402PrOa8AARjB0-300x85.jpg 300w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/G402PrOa8AARjB0-1024x289.jpg 1024w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/G402PrOa8AARjB0-768x217.jpg 768w\" sizes=\"(max-width: 1346px) 100vw, 1346px\" \/><figcaption id=\"caption-attachment-505566\" class=\"wp-caption-text\">How Attacker Exploited Balancer Code (Source: Phalcon)<\/figcaption><\/figure>\n<p>Crypto analyst Adi <a href=\"https:\/\/x.com\/AdiFlips\/status\/1985279811011457363\">wrote<\/a>:<\/p>\n<blockquote><p>&#8220;Improper authorization and callback handling allowed the attacker to bypass safeguards. This enabled unauthorized swaps or balance manipulations across interconnected pools, draining assets in rapid succession (within minutes).&#8221;<\/p><\/blockquote>\n<p>Meanwhile, Balancer\u2019s composable vault architecture, which is long praised for its flexibility, amplified the damage. Because vaults could reference each other dynamically, the distortion rippled through interconnected pools.<\/p>\n<p>Interestingly, <a href=\"https:\/\/cryptoslate.com\/companies\/coinbase\/\">Coinbase\u2019s<\/a> Conor Grogan <a href=\"https:\/\/x.com\/jconorgrogan\/status\/1985347767795859898\">pointed out<\/a> that the attacker\u2019s approach suggested professional sophistication.<\/p>\n<p>Grogan noted that the attacker\u2019s address was initially funded with 100 ETH from Tornado Cash, implying the funds likely originated from earlier exploits.<\/p>\n<p>&#8220;People don\u2019t typically park 100 ETH in Tornado Cash for fun,&#8221; he <a href=\"https:\/\/x.com\/jconorgrogan\/status\/1985347767795859898\">wrote<\/a>, suggesting the transaction pattern reflected an experienced and previously active hacker.<\/p>\n<h2>DeFi trust collapse<\/h2>\n<p>While the exploit itself was technical, its impact was psychological.<\/p>\n<p>Balancer had long been regarded as a conservative venue for liquidity providers, a place to park assets and earn modest, steady yield. Its longevity, audits, and integrations across leading DeFi platforms fostered the illusion that endurance equaled safety. The Nov. 3 breach destroyed that narrative overnight.<\/p>\n<p>Lefteris Karapetsas, founder of the crypto platform Rotki, <a href=\"https:\/\/x.com\/LefterisJP\/status\/1985300015548428789\">called<\/a> it \u201ca trust collapse&#8221; and not just a hack of the DeFi platform.<\/p>\n<p>He decried the fact that:<\/p>\n<blockquote><p>&#8220;A protocol live since 2020, audited and widely used, can still suffer a near-total TVL loss. That\u2019s a red flag for anyone who believes DeFi is &#8216;stable.'&#8221;<\/p><\/blockquote>\n<p>That reaction captured the broader sentiment. In a market that prizes self-custody and verifiable code, confidence had quietly replaced trust as the hidden foundation of DeFi.<\/p>\n<p>Balancer\u2019s failure showed that even mathematically sound systems are vulnerable to unforeseen complexity.<\/p>\n<p>Robdog, the pseudonymous developer of Cork Protocol, <a href=\"https:\/\/x.com\/robdogeth\/status\/1985307593133506823?s=46\">said<\/a>:<\/p>\n<blockquote><p>&#8220;Whilst [DeFi] foundations are becoming safer and safer, the sad reality is smart contract risk is all around us.&#8221;<\/p><\/blockquote>\n<h2>Implications for DeFi<\/h2>\n<p>The Balancer exploit hit at a delicate point for decentralized finance, shattering a brief period of calm. In October, total losses from hacks dropped to a yearly low of just $18 million, according to PeckShield.<\/p>\n<p>However, with a single incident in November, the figure has already surged past $120 million, making it the third-worst month for DeFi breaches in 2025.<\/p>\n<figure id=\"attachment_505573\" aria-describedby=\"caption-attachment-505573\" style=\"width: 1048px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-505573\" src=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/Screenshot-2025-11-03-171106.jpg\" alt=\"DeFi Hacks\" width=\"1048\" height=\"364\" srcset=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/Screenshot-2025-11-03-171106.jpg 1048w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/Screenshot-2025-11-03-171106-300x104.jpg 300w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/Screenshot-2025-11-03-171106-1024x356.jpg 1024w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/Screenshot-2025-11-03-171106-768x267.jpg 768w\" sizes=\"(max-width: 1048px) 100vw, 1048px\" \/><figcaption id=\"caption-attachment-505573\" class=\"wp-caption-text\">Monthly DeFi Hacks Losses in 2025 (Source: DeFiLlama)<\/figcaption><\/figure>\n<p>Meanwhile, this attack highlights a fundamental paradox at the heart of DeFi: composability, the feature that enables protocols to connect and build upon one another, also amplifies\u00a0systemic risk.<\/p>\n<p>When a core protocol like Balancer breaks, the impact ripples instantly through the networks that depend on it.<\/p>\n<p>On Berachain, validators <a href=\"https:\/\/x.com\/berachain\/status\/1985288599152042101\">paused<\/a> block production to prevent contagion. Other protocols followed with temporary suspensions of lending and bridging functions.<\/p>\n<p>These quick reactions limited losses, but they also underscored a broader truth showing that DeFi operates without the coordination mechanisms that steady traditional finance.<\/p>\n<p>In this space, there are no regulators, central banks, or mandated backstops. Instead, crisis management relies heavily on developers and auditors working in tandem, often within minutes, to contain the fallout.<\/p>\n<p>Considering this, Robdog said:<\/p>\n<blockquote><p>[This is] a good reminder why we need to develop better risk management infrastructure.&#8221;<\/p><\/blockquote>\n<p>Beyond the immediate technical loss, the damage to trust may be harder to repair.<\/p>\n<p>Each major exploit erodes confidence in DeFi\u2019s promise of self-regulating code. For institutional investors considering exposure to the industry, the repeated failures signal that decentralized markets remain experimental.<\/p>\n<p>Karapetsas noted:<\/p>\n<blockquote><p>&#8220;No serious capital allocates into systems that are this fragile.&#8221;<\/p><\/blockquote>\n<p>That perception is already shaping policy in major economies globally.<\/p>\n<p>Suhail Kakar, a prominent web3 developer, <a href=\"https:\/\/x.com\/SuhailKakar\/status\/1985331523646615664\">highlighted<\/a> a sobering reality in the aftermath of the Balancer exploit: even multiple, high-profile security audits can\u2019t guarantee safety in DeFi.<\/p>\n<p>As he noted, Balancer underwent more than ten audits, with its core vault contract reviewed by several independent firms; yet, the protocol still suffered a major breach.<\/p>\n<p>Kakar\u2019s point highlights a growing sentiment in the industry that \u201caudited by X\u201d is no longer a mark of infallibility; rather, it reflects the inherent complexity and unpredictability of decentralized systems where even well-tested code can harbor unseen vulnerabilities.<\/p>\n<figure id=\"attachment_505585\" aria-describedby=\"caption-attachment-505585\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-505585 size-large\" src=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/balancer-audits-1024x640.jpeg\" alt=\"Balancer V2 Audits (Source: Balancer docs via Suhail Kakar)\" width=\"1024\" height=\"640\" srcset=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/balancer-audits-1024x640.jpeg 1024w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/balancer-audits-300x187.jpeg 300w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/balancer-audits-768x480.jpeg 768w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/balancer-audits-1536x959.jpeg 1536w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2025\/11\/balancer-audits-2048x1279.jpeg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption id=\"caption-attachment-505585\" class=\"wp-caption-text\">Balancer V2 Audits (Source: Balancer docs via Suhail Kakar)<\/figcaption><\/figure>\n<p>Authorities in the United States are developing frameworks that would introduce regulations on DeFi protocols. Industry observers expect the Balancer exploit to accelerate these efforts, as policymakers grapple with the growing risk of continued integration between crypto and the traditional financial industry.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>For years, Balancer stood as one of DeFi&#8217;s most reliable institutions, a protocol that had survived several bear markets, audits, and integrations without scandal. However, that credibility collapsed on Nov. 3, when the blockchain security firm PeckShield reported that Balancer and several of its forks were under an active exploit spreading across multiple chains. Within [&hellip;]<\/p>\n","protected":false},"author":720,"featured_media":505541,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46940,16041],"tags":[75597,72190],"post_folder":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.9 (Yoast SEO v21.9.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Balancer exploit shakes DeFi as $128 million vanishes<\/title>\n<meta name=\"description\" content=\"Balancer exploit exposes DeFi&#039;s vulnerability amid systemic risk, undermining trust in decentralized finance&#039;s self-regulation promise.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cryptoslate.com\/how-11-audits-couldnt-stop-balancers-128-million-hack-redefining-defi-risks\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" 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