{"id":78663,"date":"2026-05-20T17:47:01","date_gmt":"2026-05-20T14:17:01","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-47068-cross-session-pubsub-topic-injection-via-url-parameter-in-phoenix_storybook\/"},"modified":"2026-05-20T17:47:01","modified_gmt":"2026-05-20T14:17:01","slug":"cve-2026-47068-cross-session-pubsub-topic-injection-via-url-parameter-in-phoenix_storybook","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-47068-cross-session-pubsub-topic-injection-via-url-parameter-in-phoenix_storybook\/","title":{"rendered":"CVE-2026-47068 &#8211; Cross-session PubSub topic injection via URL parameter in phoenix_storybook"},"content":{"rendered":"<p>CVE ID :CVE-2026-47068<\/p>\n<p>  Published : May 20, 2026, 2:17 p.m. | 40\u00a0minutes ago<\/p>\n<p>  Description :Authorization Bypass Through User-Controlled Key vulnerability in phenixdigital phoenix_storybook allows cross-session PubSub topic injection via a URL query parameter.<\/p>\n<p>&#8216;Elixir.PhoenixStorybook.Story.ComponentIframeLive&#8217;:handle_params\/3 in lib\/phoenix_storybook\/live\/story\/component_iframe_live.ex reads a PubSub topic directly from params[&#8220;topic&#8221;] and broadcasts {:component_iframe_pid, self()} on it with no check that the topic belongs to the requesting session. The shared PhoenixStorybook.PubSub is used to coordinate playground LiveViews with their iframes: a playground subscribes to a session-specific topic and uses the received iframe pid to direct subsequent control messages (variation state, theme switches, extra-assign payloads) via send\/2. Because the iframe trusts the query parameter, an attacker who loads \/storybook\/iframe\/?topic= causes their iframe process pid to be announced on the victim&#8217;s topic. The victim&#8217;s playground then addresses its private messages to the attacker&#8217;s iframe process.<\/p>\n<p>This issue affects phoenix_storybook from 0.4.0 before 1.1.0.<\/p>\n<p>  Severity: 2.3 | LOW<\/p>\n<p>  Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID :CVE-2026-47068 Published : May 20, 2026, 2:17 p.m. | 40\u00a0minutes ago Description :Authorization Bypass Through User-Controlled Key vulnerability in phenixdigital phoenix_storybook allows cross-session PubSub topic injection via a URL query parameter. &#8216;Elixir.PhoenixStorybook.Story.ComponentIframeLive&#8217;:handle_params\/3 in lib\/phoenix_storybook\/live\/story\/component_iframe_live.ex reads a PubSub topic directly from params[&#8220;topic&#8221;] and broadcasts {:component_iframe_pid, self()} on it with no check that the topic &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-78663","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/78663","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=78663"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/78663\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=78663"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=78663"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=78663"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}