{"schemaVersion":3,"id":"CVE-2026-55644","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"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 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.","dates":{"published":"2026-10-19T17:54:58.499Z","modified":"2026-10-19T17:54:58.499Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.1,"severity":"medium","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"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","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":5.1,"severity":"medium","vector":"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","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":5.1,"severity":"medium","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00304,"percentile":0.21901,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-20T00:00:00.000Z","score":0.00304,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00304,"percentile":0.21901}],"last30":[{"date":"2026-10-20T00:00:00.000Z","score":0.00304,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00304,"percentile":0.21901}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-20","name":"Improper Input Validation","description":"The product receives input or data, but it does\n        not validate or incorrectly validates that the input has the\n        properties that are required to process the data safely and\n        correctly.","type":"weakness","status":"Stable","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/20.html"}],"affected":[{"vendor":"element-hq","product":"element-x-ios","name":"element-x-ios","label":"element-x-ios","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 26.05.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 26.05.0","eol":null,"hubHref":"/vendor/element-hq/element-x-ios"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/element-hq/element-x-ios/security/advisories/GHSA-54w7-rw44-49m7","label":"github.com/element-hq/element-x-ios/security/advisories/GHSA-54w7-rw44-49m7","hostname":"github.com","tags":["X Refsource CONFIRM"]},{"url":"https://github.com/element-hq/element-x-ios/pull/5515","label":"github.com/element-hq/element-x-ios/pull/5515","hostname":"github.com","tags":["X Refsource MISC"]},{"url":"https://github.com/element-hq/element-x-ios/commit/63592e48c1a1e47f75693045efd85a7d4468ea84","label":"github.com/element-hq/element-x-ios/commit/63592e48c1a1e47f75693045efd85a7d4468ea84","hostname":"github.com","tags":["X Refsource MISC"]},{"url":"https://github.com/element-hq/element-x-ios/releases/tag/release/26.05.0","label":"github.com/element-hq/element-x-ios/releases/tag/release/26.05.0","hostname":"github.com","tags":["X Refsource MISC"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-19T17:54:58.499Z","label":"Published","detail":"Vulnerability first disclosed.","source":null}],"risk":{"score":20,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T18:10:24.437Z","stale":false,"partial":false}}