{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-4712/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Firefox","Thunderbird"],"_cs_severities":["medium"],"_cs_tags":["information disclosure","firefox","thunderbird","cve-2026-4712"],"_cs_type":"advisory","_cs_vendors":["Mozilla"],"content_html":"\u003cp\u003eCVE-2026-4712 is an information disclosure vulnerability found within the Widget: Cocoa component of Mozilla Firefox and Thunderbird. This vulnerability affects Firefox versions prior to 149, Firefox ESR versions prior to 140.9, Thunderbird versions prior to 149, and Thunderbird ESR versions prior to 140.9. While the specific details of the vulnerability are not explicitly outlined in the provided source, the vulnerability could potentially allow a remote attacker to glean sensitive data. The advisory was published on March 24, 2026. Defenders need to ensure their Firefox and Thunderbird clients are updated.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a target user running a vulnerable version of Firefox or Thunderbird (versions \u0026lt; 149, or ESR \u0026lt; 140.9).\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious webpage or email designed to trigger the vulnerability in the Widget: Cocoa component. The precise mechanism is not detailed, but likely involves manipulating how the application handles specific types of data or requests.\u003c/li\u003e\n\u003cli\u003eThe victim unknowingly interacts with the malicious content by visiting the webpage in Firefox or opening the email in Thunderbird.\u003c/li\u003e\n\u003cli\u003eThe vulnerable Widget: Cocoa component processes the malicious content, leading to the unintended disclosure of sensitive information.\u003c/li\u003e\n\u003cli\u003eThe attacker retrieves the disclosed information, which could include browsing history, cookies, cached data, or other sensitive user data.\u003c/li\u003e\n\u003cli\u003eThe attacker analyzes the exfiltrated data for valuable information.\u003c/li\u003e\n\u003cli\u003eThe attacker leverages the disclosed information for further malicious activities, such as account takeover or identity theft.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-4712 could allow an attacker to gain unauthorized access to sensitive information stored or processed by the affected Firefox and Thunderbird applications. This may lead to the exposure of user credentials, personal data, and other confidential information. The number of potential victims is dependent on the number of users running vulnerable versions of the software. The targeted sectors are broad as Firefox and Thunderbird are widely used across various industries and by individual users.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade Firefox to version 149 or later to remediate CVE-2026-4712.\u003c/li\u003e\n\u003cli\u003eUpgrade Firefox ESR to version 140.9 or later to remediate CVE-2026-4712.\u003c/li\u003e\n\u003cli\u003eUpgrade Thunderbird to version 149 or later to remediate CVE-2026-4712.\u003c/li\u003e\n\u003cli\u003eUpgrade Thunderbird ESR to version 140.9 or later to remediate CVE-2026-4712.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-01-26T18:22:00Z","date_published":"2024-01-26T18:22:00Z","id":"https://feed.craftedsignal.io/briefs/2024-01-firefox-info-disclosure/","summary":"CVE-2026-4712 is an information disclosure vulnerability in the Widget: Cocoa component affecting Firefox versions less than 149, Firefox ESR versions less than 140.9, Thunderbird versions less than 149, and Thunderbird versions less than 140.9, potentially allowing a remote attacker to access sensitive information.","title":"Mozilla Firefox and Thunderbird Information Disclosure Vulnerability (CVE-2026-4712)","url":"https://feed.craftedsignal.io/briefs/2024-01-firefox-info-disclosure/"}],"language":"en","title":"CraftedSignal Threat Feed - Cve-2026-4712","version":"https://jsonfeed.org/version/1.1"}