{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-4709/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":["cve-2026-4709","denial-of-service","firefox","thunderbird"],"_cs_type":"advisory","_cs_vendors":["Mozilla"],"content_html":"\u003cp\u003eCVE-2026-4709 describes a vulnerability affecting Mozilla Firefox and Thunderbird related to incorrect boundary conditions in the Graphics Media Player (GMP) component's audio/video processing. Specifically, Firefox versions prior to 149, Firefox ESR versions prior to 115.34 and 140.9, Thunderbird versions prior to 149, and Thunderbird versions prior to 140.9 are affected. Successful exploitation of this vulnerability could lead to a denial-of-service condition. This vulnerability was disclosed on March 24, 2026, and defenders should ensure their Firefox and Thunderbird installations are updated to the latest versions to mitigate the risk.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker crafts a malicious audio/video file or stream.\u003c/li\u003e\n\u003cli\u003eThe user opens the crafted file or visits a website embedding it via Firefox or Thunderbird.\u003c/li\u003e\n\u003cli\u003eThe GMP component attempts to process the audio/video data.\u003c/li\u003e\n\u003cli\u003eThe incorrect boundary conditions within the GMP component are triggered due to the malformed data.\u003c/li\u003e\n\u003cli\u003eThis leads to a memory corruption or other unexpected behavior within the GMP component.\u003c/li\u003e\n\u003cli\u003eThe application (Firefox or Thunderbird) becomes unstable.\u003c/li\u003e\n\u003cli\u003eThe application crashes, resulting in a denial of service.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-4709 can result in a denial-of-service condition. While the NVD entry assigns a CVSS score of 7.5 (High), the impact is limited to the availability of the affected application. Users would experience unexpected crashes and be unable to use the browser or email client until it is restarted. Widespread exploitation could impact productivity and potentially disrupt workflows relying on Firefox or Thunderbird.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade all Firefox installations to version 149 or later to remediate CVE-2026-4709.\u003c/li\u003e\n\u003cli\u003eUpgrade all Firefox ESR installations to version 115.34 or 140.9 or later to remediate CVE-2026-4709.\u003c/li\u003e\n\u003cli\u003eUpgrade all Thunderbird installations to version 149 or later to remediate CVE-2026-4709.\u003c/li\u003e\n\u003cli\u003eMonitor process crashes of Firefox and Thunderbird with unexpected module faults to identify potential exploitation attempts.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-01-27T12:00:00Z","date_published":"2024-01-27T12:00:00Z","id":"https://feed.craftedsignal.io/briefs/2024-01-cve-2026-4709-firefox-dos/","summary":"A vulnerability exists in the Audio/Video: GMP component of Mozilla Firefox and Thunderbird due to incorrect boundary conditions, potentially leading to a denial-of-service condition.","title":"Mozilla Firefox and Thunderbird GMP Component Denial-of-Service Vulnerability (CVE-2026-4709)","url":"https://feed.craftedsignal.io/briefs/2024-01-cve-2026-4709-firefox-dos/"}],"language":"en","title":"CraftedSignal Threat Feed - Cve-2026-4709","version":"https://jsonfeed.org/version/1.1"}