{"id":"CVE-2022-26486","kind":"vulnerability","aliases":["CVE-2022-26486"],"related":[],"title":"Mozilla Firefox: Mozilla Firefox Use-After-Free Vulnerability","description":"An unexpected message in the WebGPU IPC framework could lead to a use-after-free and exploitable sandbox escape. We have had reports of attacks in the wild abusing this flaw. This vulnerability affects Firefox < 97.0.2, Firefox ESR < 91.6.1, Firefox for Android < 97.3.0, Thunderbird < 91.6.2, and Focus < 97.3.0.","summary":"Mozilla Firefox has a use-after-free bug in its WebGPU IPC framework. An attacker who gets a user to load a malicious page can run arbitrary code in the browser.","severity":"critical","cvss":9.6,"epss":0.02362,"exploited":true,"exploited_at":"2022-03-07T00:00:00+00:00","products":[{"name":"Mozilla Firefox","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["desktop-browsers","endpoints","exploited","firefox","other"],"not_affected_if":["fixed-version-installed"],"how_to_check":"Open Firefox and check the version under Help > About Firefox, then compare it with the fixed version in Mozilla's advisory (fixed version unknown from sources).","fix":"Update Firefox to a version newer than the fixed release listed in Mozilla's security advisory for CVE-2022-26486 (exact version unknown from sources).\nIf updates are managed centrally, deploy the vendor update to all endpoints.","status":"open","published_at":"2022-03-07T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:23:55+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-10-23T21:23:55Z","model":"claude-haiku-5-5","output":{"fix":"Update Firefox to a version newer than the fixed release listed in Mozilla's security advisory for CVE-2022-26486 (exact version unknown from sources).\nIf updates are managed centrally, deploy the vendor update to all endpoints.","reach":"internet","impact":"high","summary":"Mozilla Firefox has a use-after-free bug in its WebGPU IPC framework. An attacker who gets a user to load a malicious page can run arbitrary code in the browser.","category":"other","who_cares":["firefox","desktop-browsers","endpoints"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker runs arbitrary code inside the victim's browser session.","analyst_note":"Find the fixed Firefox version and the Mozilla advisory for CVE-2022-26486 and confirm whether WebGPU must be enabled to be exploitable.","how_to_check":"Open Firefox and check the version under Help > About Firefox, then compare it with the fixed version in Mozilla's advisory (fixed version unknown from sources).","needs_analyst":true,"not_affected_if":["fixed-version-installed"],"user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000499,"input_tokens":2832,"output_tokens":431,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2022':11A,14A '-26486':12A,15A '91.6.1':95C '91.6.2':101C '97.0.2':92C '97.3.0':99C,104C 'abus':85C 'affect':90C 'android':98C 'arbitrari':51B 'attack':39B,81C 'browser':20B,55B 'bug':32B 'code':52B 'could':64C 'cve':10A,13A 'desktop':19B 'desktop-brows':18B 'endpoint':21B 'escap':75C 'esr':94C 'exploit':22B,73C 'firefox':2A,4A,17A,23B,25B,91C,93C,96C 'flaw':87C 'focus':103C 'framework':37B,63C 'free':8A,31B,71C 'get':41B 'ipc':36B,62C 'lead':65C 'load':45B 'malici':47B 'messag':58C 'mozilla':1A,3A,16A,24B 'page':48B 'report':79C 'run':50B 'sandbox':74C 'thunderbird':100C 'unexpect':57C 'use':6A,29B,69C 'use-after-fre':5A,28B,68C 'user':43B 'vulner':9A,89C 'webgpu':35B,61C 'wild':84C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2022-03-07T00:00:00+00:00","kev":{"dateAdded":"2022-03-07","dueDate":"2022-03-21","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2022-26486","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-26486","severity":null,"published_at":"2022-03-07T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T11:39:17+00:00","note":null},{"source":"epss","external_id":"CVE-2022-26486","url":"https://api.first.org/data/v1/epss?cve=CVE-2022-26486","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2022-26486","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-26486","severity":null,"published_at":"2022-12-22T20:15:22+00:00","modified_at":"2026-08-19T15:29:21+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}