{"id":"CVE-2026-55644","title":"Element X iOS: io.element.call deeplink allows attacker-controlled HTTPS origin and may grant mic/camera to that origin","summary":"Element X iOS is a Matrix iOS Client provided by Element. Element X iOS before version 26.05.0 fails to check the URL allowlist when parsing io.element.call://. If an attacker is able to trick the user into opening a maliciously crafted …","severity":"medium","cvss":5.1,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-20"],"vendor":"element-hq","product":"element-x-ios","affected":["element-x-ios < 26.05.0"],"published":"2026-10-19","updated":"2026-10-19","sourceUpdated":"2026-10-19T17:54:58.499Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-55644","references":[{"url":"https://github.com/element-hq/element-x-ios/security/advisories/GHSA-54w7-rw44-49m7","label":"https://github.com/element-hq/element-x-ios/security/advisories/GHSA-54w7-rw44-49m7"},{"url":"https://github.com/element-hq/element-x-ios/pull/5515","label":"https://github.com/element-hq/element-x-ios/pull/5515"},{"url":"https://github.com/element-hq/element-x-ios/commit/63592e48c1a1e47f75693045efd85a7d4468ea84","label":"https://github.com/element-hq/element-x-ios/commit/63592e48c1a1e47f75693045efd85a7d4468ea84"},{"url":"https://github.com/element-hq/element-x-ios/releases/tag/release/26.05.0","label":"https://github.com/element-hq/element-x-ios/releases/tag/release/26.05.0"}],"tags":["cve.org"],"ingestedAt":"2026-10-19T18:35:50.156Z","slug":"CVE-2026-55644","body":"## Overview\n\nElement X iOS is a Matrix iOS Client provided by Element. Element X iOS before version 26.05.0 fails to check the URL allowlist when parsing io.element.call://. If an attacker is able to trick the user into opening a maliciously crafted io.element.call:// URL, they are able to load an attacker-controlled origin inside the call screen's WKWebView which will be granted device microphone and camera permissions (provided the user has previously granted these permissions to Element X iOS). This issue has been patched in version 26.05.0.\n\n## Affected\n\n- `element-x-ios < 26.05.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":28,"depthScoreParts":{"impact":28.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}