{"id":14774,"date":"2026-10-21T23:04:50","date_gmt":"2026-10-21T23:04:50","guid":{"rendered":"https:\/\/cryptonews.uk.com\/?p=14774"},"modified":"2026-10-21T23:04:50","modified_gmt":"2026-10-21T23:04:50","slug":"bitcoin-lightning-developers-sound-alarm-over-security-flaws-as-second-patch-lands-in-five-days","status":"publish","type":"post","link":"https:\/\/cryptonews.uk.com\/?p=14774","title":{"rendered":"Bitcoin Lightning developers sound alarm over security flaws as second patch lands in five days"},"content":{"rendered":"<p><\/p>\n<div data-cs-editorial-figure-scope=\"\" data-cs-editorial-quote-scope=\"\" data-cs-image-viewer-scope=\"\" data-single-article-content=\"\">\n<p>Bitcoin Lightning developer ACINQ urged node operators to upgrade Eclair after patching security flaws that malicious peers could exploit.<\/p>\n<p>The company released Eclair version 0.14.5 on Oct. 20, its second security-focused update in five days, warning that some of the newly addressed vulnerabilities could be exploited by hostile nodes. The software powers Bitcoin Lightning nodes that maintain payment channels and route transactions across the network.<\/p>\n<p>The developers credited security researchers Nuhiat-Arefin and mptfire with responsibly disclosing problems addressed in the update.<\/p>\n<p>The warning places renewed pressure on Lightning node operators, who maintain Bitcoin-funded payment channels used to transfer funds across the network. Vulnerabilities involving interactions with malicious peers create potential security and operational risks for infrastructure supporting Lightning payments.<\/p>\n<p>However, ACINQ has not detailed the newly patched exploit mechanisms or specified which older versions are affected. The announcement also reported no confirmed attacks or financial losses, leaving the potential financial consequences unclear.<\/p>\n<p><img loading=\"lazy\" loading=\"lazy\" decoding=\"async\" class=\"aligncenter shoggoth-infographic shoggoth-infographic-portrait wp-image-574915\" src=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-d82841ac-7ef0-4964-97ee-cc1da4bd06d7.png\" alt=\"Eclair 0.14.5 operator guide: stop Eclair, install the update and restart without closing existing channels; release notes leave exploit mechanisms and the affected-version range unspecified and do not report observed attacks or losses.\" width=\"720\" height=\"900\" srcset=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-d82841ac-7ef0-4964-97ee-cc1da4bd06d7.png 1122w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-d82841ac-7ef0-4964-97ee-cc1da4bd06d7-240x300.png 240w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-d82841ac-7ef0-4964-97ee-cc1da4bd06d7-819x1024.png 819w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-d82841ac-7ef0-4964-97ee-cc1da4bd06d7-768x960.png 768w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\"\/><img loading=\"lazy\" loading=\"lazy\" decoding=\"async\" class=\"lazyload aligncenter shoggoth-infographic shoggoth-infographic-portrait wp-image-574915\" src=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-d82841ac-7ef0-4964-97ee-cc1da4bd06d7.png\" alt=\"Eclair 0.14.5 operator guide: stop Eclair, install the update and restart without closing existing channels; release notes leave exploit mechanisms and the affected-version range unspecified and do not report observed attacks or losses.\" width=\"720\" height=\"900\" srcset=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-d82841ac-7ef0-4964-97ee-cc1da4bd06d7.png 1122w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-d82841ac-7ef0-4964-97ee-cc1da4bd06d7-240x300.png 240w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-d82841ac-7ef0-4964-97ee-cc1da4bd06d7-819x1024.png 819w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-d82841ac-7ef0-4964-97ee-cc1da4bd06d7-768x960.png 768w\" data-sizes=\"(max-width: 720px) 100vw, 720px\"\/><\/p>\n<p>The developers have sought to minimize disruption from the upgrade. According to the release instructions, operators can install the update without closing existing payment channels.<\/p>\n<p>Instead, they must stop Eclair, install the new version, and restart the software. This avoids the blockchain transactions and channel reconfiguration that closing and reopening Lightning channels can require.<\/p>\n<aside id=\"cs-inline-newsletter-1\" class=\"cs-inline-newsletter cs-newsletter-brand\" data-newsletter-edition=\"catalyst\" data-inline-newsletter=\"\" data-newsletter-placement=\"article-midpoint\" aria-labelledby=\"cs-inline-newsletter-1-title\" aria-describedby=\"cs-inline-newsletter-1-copy\">\n<div class=\"cs-inline-newsletter__inner\">\n<div class=\"cs-inline-newsletter__content\">\n<div class=\"cs-inline-newsletter__editorial\">\n<p class=\"cs-inline-newsletter__eyebrow\">The Catalyst<\/p>\n<p class=\"cs-newsletter-frequency\">Daily Newsletter<\/p>\n<h2 id=\"cs-inline-newsletter-1-title\" class=\"cs-inline-newsletter__title\">Know what\u2019s moving crypto.<\/h2>\n<p id=\"cs-inline-newsletter-1-copy\" class=\"cs-inline-newsletter__copy\">Start with the stories that matter. Get the context behind the headlines and a clear view of what to watch next.<\/p>\n<\/div>\n<div class=\"cs-inline-newsletter__art\" aria-hidden=\"true\"> <img loading=\"lazy\" src=\"https:\/\/cryptoslate.com\/wp-content\/themes\/cryptoslate-2020\/images\/catalyst-newsletter-scrapbook-v3.webp\" alt=\"\" width=\"640\" height=\"640\" loading=\"lazy\" decoding=\"async\"\/><img loading=\"lazy\" class=\"lazyload\" src=\"https:\/\/cryptoslate.com\/wp-content\/themes\/cryptoslate-2020\/images\/catalyst-newsletter-scrapbook-v3.webp\" alt=\"\" width=\"640\" height=\"640\" loading=\"lazy\" decoding=\"async\"\/><\/div>\n<\/div>\n<\/div>\n<\/aside>\n<h2>Eclair&#8217;s second security update in five days<\/h2>\n<p>The latest warning follows an Oct. 15 security release that introduced additional protections against malicious nodes and addressed a vulnerability involving Eclair&#8217;s administrative interface.<\/p>\n<p>That earlier update, version 0.14.4, blocked API requests carrying an Origin header, preventing direct browser access to the software&#8217;s application programming interface.<\/p>\n<p>The developers explained that browsers could automatically attach cached login credentials to cross-site requests. As a result, a malicious website a node operator visits could send authenticated commands to the node through a simple web form.<\/p>\n<p>The change eliminated that attack route by rejecting browser-originated requests while preserving ordinary command-line access.<\/p>\n<p>However, it also introduced an operational requirement for businesses and developers using browser-based Lightning management tools. Those interfaces now require an intermediary backend to communicate with Eclair&#8217;s API.<\/p>\n<p>The latest release extends the project&#8217;s recent security work, although its maintainers have not linked the newly patched vulnerabilities to the previously documented browser issue.<\/p>\n<p>The successive updates also mean operators who installed the Oct. 15 release must upgrade again to obtain the protections introduced five days later.<\/p>\n<div class=\"cs-article-embed\">\n<p> <span class=\"cs-article-embed__related-reading\">Related Reading<\/span><\/p>\n<h3 class=\"cs-article-embed__title\">Eclair merges fixes for Lightning flaws that could burn Bitcoin in fees<\/h3>\n<\/p>\n<p> <span class=\"cs-article-embed__arrow\" aria-hidden=\"true\"> <i class=\"fa-light fa-arrow-up-right\"\/> <\/span> <\/div>\n<p>ACINQ has added safeguards to the installation process, including signed release files and SHA-256 checksums that let operators verify downloaded software before deploying it.<\/p>\n<p>Those checks matter most for infrastructure handling Bitcoin-funded payment channels, where installing compromised software could introduce risks beyond the vulnerabilities being repaired.<\/p>\n<p>Eclair 0.14.5 is now the project&#8217;s latest release, so operators seeking the newest security protections must complete another installation cycle.<\/p>\n<p>The remaining question is how widely older deployments are exposed. ACINQ has not yet published a detailed vulnerability breakdown or list of affected versions, leaving operators without a documented basis to determine whether their existing software can safely remain in production.<\/p>\n<\/div>\n<p>Featured,Lightning,Technology,Bitcoin,BTC,paymentsBitcoin,BTC,payments#Bitcoin #Lightning #developers #sound #alarm #security #flaws #patch #lands #days1792623890<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bitcoin Lightning developer ACINQ urged node operators to upgrade Eclair after patching security flaws that malicious peers could exploit. The company released Eclair version 0.14.5 on Oct. 20, its second security-focused update in five days, warning that some of the newly addressed vulnerabilities could be exploited by hostile nodes. The software powers Bitcoin Lightning nodes<\/p>\n","protected":false},"author":1,"featured_media":14775,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[2936,91,285,616,1337,6619,1325,2661,6427,167,1676,7520],"class_list":["post-14774","post","type-post","status-publish","format-standard","has-post-thumbnail","category-ethereum","tag-alarm","tag-bitcoin","tag-btc","tag-days","tag-developers","tag-flaws","tag-lands","tag-lightning","tag-patch","tag-payments","tag-security","tag-sound"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.6 (Yoast SEO v26.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Bitcoin Lightning developers sound alarm over security flaws as second patch lands in five days - Crypto News: Latest Cryptocurrency News and Analysis<\/title>\n<meta name=\"description\" content=\"Bitcoin Lightning developer released its second security update in five days, warning that malicious nodes could exploit newly patched flaws.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cryptonews.uk.com\/?p=14774\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bitcoin Lightning developers sound alarm over security flaws as second patch lands in five days\" \/>\n<meta property=\"og:description\" content=\"Bitcoin Lightning developer released its second security update in five days, warning that malicious nodes could exploit newly patched flaws.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cryptonews.uk.com\/?p=14774\" \/>\n<meta property=\"og:site_name\" content=\"Crypto News: Latest Cryptocurrency News and Analysis\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-21T23:04:50+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cryptonews.uk.com\/wp-content\/uploads\/2026\/10\/eclair-network-protection-upgrade.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"720\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"\u884c\u653f\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u884c\u653f\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/cryptonews.uk.com\/?p=14774\",\"url\":\"https:\/\/cryptonews.uk.com\/?p=14774\",\"name\":\"Bitcoin Lightning developers sound alarm over security flaws as second patch lands in five days - Crypto News: Latest Cryptocurrency News and Analysis\",\"isPartOf\":{\"@id\":\"https:\/\/cryptonews.uk.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/cryptonews.uk.com\/?p=14774#primaryimage\"},\"image\":{\"@id\":\"https:\/\/cryptonews.uk.com\/?p=14774#primaryimage\"},\"thumbnailUrl\":\"https:\/\/cryptonews.uk.com\/wp-content\/uploads\/2026\/10\/eclair-network-protection-upgrade.webp\",\"datePublished\":\"2026-10-21T23:04:50+00:00\",\"author\":{\"@id\":\"https:\/\/cryptonews.uk.com\/#\/schema\/person\/822778c5844e0d16d43dce6630f4f1bf\"},\"description\":\"Bitcoin Lightning developer released its second security update in five days, warning that malicious nodes could exploit newly patched flaws.\",\"breadcrumb\":{\"@id\":\"https:\/\/cryptonews.uk.com\/?p=14774#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/cryptonews.uk.com\/?p=14774\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/cryptonews.uk.com\/?p=14774#primaryimage\",\"url\":\"https:\/\/cryptonews.uk.com\/wp-content\/uploads\/2026\/10\/eclair-network-protection-upgrade.webp\",\"contentUrl\":\"https:\/\/cryptonews.uk.com\/wp-content\/uploads\/2026\/10\/eclair-network-protection-upgrade.webp\",\"width\":1280,\"height\":720},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/cryptonews.uk.com\/?p=14774#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/cryptonews.uk.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Bitcoin Lightning developers sound alarm over security flaws as second patch lands in five days\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/cryptonews.uk.com\/#website\",\"url\":\"https:\/\/cryptonews.uk.com\/\",\"name\":\"Crypto News: Latest Cryptocurrency News and Analysis\",\"description\":\"Latest Crypto &amp; 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