{"id":"CVE-2026-8706","aliases":["EUVD-2026-30943","GHSA-4c2h-7p75-v7hg","UBUNTU-CVE-2026-8706"],"status":"published","title":"Sensitive user data could be leaked to other applications through Reader mode","description":"Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs and receive the response rendered with the signed-in user's cookies. This vulnerability was fixed in Firefox for iOS 151.0.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.00192,"percentile":0.08921,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200","CWE-306"],"published":"2026-05-19T14:27:38Z","modified":"2026-07-23T20:10:00Z","affected":[{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"mozjs52","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["52.3.1-0ubuntu3","52.3.1-7fakesync1","52.8.1-0ubuntu0.18.04.1","52.9.1-0ubuntu0.18.04.1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"mozjs68","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["68.5.0-1~fakesync","68.5.0-2~fakesync","68.6.0-1","68.6.0-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"mozjs52","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["52.9.1-1build1","52.9.1-1ubuntu3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"mozjs102","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["102.11.0-0ubuntu0.22.04.1","102.12.0-0ubuntu0.22.04.1","102.13.0-0ubuntu0.22.04.1","102.15.1-0ubuntu0.22.04.1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"mozjs78","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["78.13.0-1","78.15.0-2","78.15.0-4ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"mozjs91","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["91.5.1-0ubuntu1","91.6.0-1","91.6.0-2","91.7.0-2","91.10.0-0ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"mozjs102","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["102.15.1-1","102.15.1-3ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"mozjs115","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["115.3.0-0ubuntu1","115.4.0-2","115.5.0-1","115.6.0-1","115.7.0-4","115.8.0-1","115.9.0-1","115.9.0-1build1","115.10.0-1"]}],"products":[{"vendor":"mozilla","product":"firefox"},{"vendor":"mozilla","product":"firefox for ios"}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2036618","tags":["Permissions Required","report"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-49/","tags":["Vendor Advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8706"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-49"},{"url":"https://github.com/advisories/GHSA-4c2h-7p75-v7hg"},{"url":"https://ubuntu.com/security/CVE-2026-8706","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-8706","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-8706","title":"Sensitive user data could be leaked to other applications through Reader mode","description":"Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs and receive the response rendered with the signed-in user's cookies. This vulnerability was fixed in Firefox for iOS 151.0.","status":"published","published":"2026-05-19T14:27:38.483Z","modified":"2026-05-19T17:12:23.626Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-306","CWE-200"],"updated_at":"2026-11-02T13:48:13.398044Z"}],"euvd":[{"id":"EUVD-2026-30943","description":"Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs and receive the response rendered with the signed-in user's cookies. This vulnerability was fixed in Firefox for iOS 151.0.","status":"published","published":"2026-05-19T14:27:38Z","modified":"2026-05-19T17:12:23Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T18:21:15.217097Z"}],"ghsa":[{"id":"GHSA-4c2h-7p75-v7hg","title":"Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another...","description":"Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs and receive the response rendered with the signed-in user's cookies. This vulnerability was fixed in Firefox for iOS 151.0.","status":"published","published":"2026-05-19T18:32:12Z","modified":"2026-05-19T18:32:17Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T15:08:12.634242Z"}],"nvd":[{"id":"CVE-2026-8706","description":"Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs and receive the response rendered with the signed-in user's cookies. This vulnerability was fixed in Firefox for iOS 151.0.","status":"published","published":"2026-05-19T16:16:22.58Z","modified":"2026-07-23T20:10:00.13Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-200","CWE-306"],"updated_at":"2026-11-02T14:12:19.752984Z"}],"osv":[{"id":"UBUNTU-CVE-2026-8706","description":"Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs and receive the response rendered with the signed-in user's cookies. This vulnerability was fixed in Firefox for iOS 151.0.","status":"published","published":"2026-05-19T16:16:00Z","modified":"2026-05-20T22:03:09.968455696Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T16:57:24.828975Z"}]}}