{"id":14602,"date":"2026-10-17T12:19:58","date_gmt":"2026-10-17T12:19:58","guid":{"rendered":"https:\/\/cryptonews.uk.com\/?p=14602"},"modified":"2026-10-17T12:19:58","modified_gmt":"2026-10-17T12:19:58","slug":"eclair-patches-a-browser-attack-that-could-send-commands-to-your-lightning-node","status":"publish","type":"post","link":"https:\/\/cryptonews.uk.com\/?p=14602","title":{"rendered":"Eclair patches a browser attack that could send commands to your Lightning node"},"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>Eclair, ACINQ&#8217;s Bitcoin Lightning node software, released v0.14.4 on Oct. 15 to block malicious webpages from issuing authenticated node commands through an operator&#8217;s browser.<\/p>\n<p>The exposure depends on an enabled Eclair API that the operator&#8217;s browser can reach, with HTTP Basic authentication already cached in that browser. Eclair&#8217;s node API can read node state, open and close channels, and send and receive payments.<\/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\">Unpatched Eclair Bitcoin Lightning nodes could crash again every time they restart<\/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>Eclair&#8217;s v0.14.4 release notes explain how cached authentication lets a malicious webpage submit a plain HTML form to the node&#8217;s API. The browser attaches the saved credentials automatically. The attacker cannot read the response, but the authenticated command still reaches the node.<\/p>\n<p><img loading=\"lazy\" loading=\"lazy\" decoding=\"async\" class=\"aligncenter shoggoth-infographic shoggoth-infographic-portrait wp-image-573282\" src=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-915efb89-76e7-405a-a991-b2e4e9fff0ed.png\" alt=\"Eclair v0.14.4 explainer: an enabled browser-reachable API and cached Basic authentication can permit forged form commands; Origin-bearing requests now receive HTTP 403, browser interfaces need a backend, and authentication plus loopback binding remain essential.\" width=\"720\" height=\"1000\" srcset=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-915efb89-76e7-405a-a991-b2e4e9fff0ed.png 1064w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-915efb89-76e7-405a-a991-b2e4e9fff0ed-216x300.png 216w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-915efb89-76e7-405a-a991-b2e4e9fff0ed-737x1024.png 737w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-915efb89-76e7-405a-a991-b2e4e9fff0ed-768x1067.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-573282\" src=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-915efb89-76e7-405a-a991-b2e4e9fff0ed.png\" alt=\"Eclair v0.14.4 explainer: an enabled browser-reachable API and cached Basic authentication can permit forged form commands; Origin-bearing requests now receive HTTP 403, browser interfaces need a backend, and authentication plus loopback binding remain essential.\" width=\"720\" height=\"1000\" srcset=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-915efb89-76e7-405a-a991-b2e4e9fff0ed.png 1064w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-915efb89-76e7-405a-a991-b2e4e9fff0ed-216x300.png 216w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-915efb89-76e7-405a-a991-b2e4e9fff0ed-737x1024.png 737w, https:\/\/cryptoslate.com\/wp-content\/uploads\/2026\/10\/exec-915efb89-76e7-405a-a991-b2e4e9fff0ed-768x1067.png 768w\" data-sizes=\"(max-width: 720px) 100vw, 720px\"\/><\/p>\n<h2>Browser interfaces need a backend<\/h2>\n<p>The patch returns HTTP 403 before the API route runs whenever a request carries an Origin header, regardless of its value.<\/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<p>The restriction also affects legitimate browser interfaces, including those hosted at the same origin as the API. Those frontends now need an intermediary backend between the browser and Eclair.<\/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\">Core Lightning patches critical security flaws and a Bitcoin payment bug<\/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>Ordinary command-line access continues. The maintainers say curl and eclair-cli do not send the Origin header, so their normal API requests are unaffected.<\/p>\n<p>The Origin check still leaves authentication and network restrictions essential. A non-browser client can omit the header, so its absence does not establish that a request is authorized. Eclair maintainer pm47 says the API should remain bound to loopback, restricting network access to the local machine.<\/p>\n<p>The browser fix merged on Sept. 15 in pull request #3380 and is included in v0.14.4 alongside the funding-fee and signer repairs CryptoSlate covered on Oct. 12.<\/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>Maintainers recommend upgrading and say operators can stop Eclair, install the update and restart without closing their Lightning channels.<\/p>\n<\/div>\n<p>Featured,Lightning,Technology,Bitcoin,BTC,paymentsBitcoin,BTC,payments#Eclair #patches #browser #attack #send #commands #Lightning #node1792239598<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Eclair, ACINQ&#8217;s Bitcoin Lightning node software, released v0.14.4 on Oct. 15 to block malicious webpages from issuing authenticated node commands through an operator&#8217;s browser. The exposure depends on an enabled Eclair API that the operator&#8217;s browser can reach, with HTTP Basic authentication already cached in that browser. Eclair&#8217;s node API can read node state, open<\/p>\n","protected":false},"author":1,"featured_media":14603,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[1280,91,377,285,7445,7245,2661,3549,4426,167,2566],"class_list":["post-14602","post","type-post","status-publish","format-standard","has-post-thumbnail","category-ethereum","tag-attack","tag-bitcoin","tag-browser","tag-btc","tag-commands","tag-eclair","tag-lightning","tag-node","tag-patches","tag-payments","tag-send"],"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>Eclair patches a browser attack that could send commands to your Lightning node - Crypto News: Latest Cryptocurrency News and Analysis<\/title>\n<meta name=\"description\" content=\"Eclair&#039;s v0.14.4 release blocks browser-origin API commands and changes frontend deployments, while command-line access continues with authentication required.\" \/>\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=14602\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Eclair patches a browser attack that could send commands to your Lightning node\" \/>\n<meta property=\"og:description\" content=\"Eclair&#039;s v0.14.4 release blocks browser-origin API commands and changes frontend deployments, while command-line access continues with authentication required.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cryptonews.uk.com\/?p=14602\" \/>\n<meta property=\"og:site_name\" content=\"Crypto News: Latest Cryptocurrency News and Analysis\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-17T12:19:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cryptonews.uk.com\/wp-content\/uploads\/2026\/10\/eclair-browser-attack-filter.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=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/cryptonews.uk.com\/?p=14602\",\"url\":\"https:\/\/cryptonews.uk.com\/?p=14602\",\"name\":\"Eclair patches a browser attack that could send commands to your Lightning node - Crypto News: Latest Cryptocurrency News and Analysis\",\"isPartOf\":{\"@id\":\"https:\/\/cryptonews.uk.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/cryptonews.uk.com\/?p=14602#primaryimage\"},\"image\":{\"@id\":\"https:\/\/cryptonews.uk.com\/?p=14602#primaryimage\"},\"thumbnailUrl\":\"https:\/\/cryptonews.uk.com\/wp-content\/uploads\/2026\/10\/eclair-browser-attack-filter.webp\",\"datePublished\":\"2026-10-17T12:19:58+00:00\",\"author\":{\"@id\":\"https:\/\/cryptonews.uk.com\/#\/schema\/person\/822778c5844e0d16d43dce6630f4f1bf\"},\"description\":\"Eclair&#039;s v0.14.4 release blocks browser-origin API commands and changes frontend deployments, while command-line access continues with authentication required.\",\"breadcrumb\":{\"@id\":\"https:\/\/cryptonews.uk.com\/?p=14602#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/cryptonews.uk.com\/?p=14602\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/cryptonews.uk.com\/?p=14602#primaryimage\",\"url\":\"https:\/\/cryptonews.uk.com\/wp-content\/uploads\/2026\/10\/eclair-browser-attack-filter.webp\",\"contentUrl\":\"https:\/\/cryptonews.uk.com\/wp-content\/uploads\/2026\/10\/eclair-browser-attack-filter.webp\",\"width\":1280,\"height\":720},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/cryptonews.uk.com\/?p=14602#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/cryptonews.uk.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Eclair patches a browser attack that could send commands to your Lightning node\"}]},{\"@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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