{"id":"CVE-2022-26485","kind":"vulnerability","aliases":["CVE-2022-26485"],"related":[],"title":"Mozilla Firefox: Mozilla Firefox Use-After-Free Vulnerability","description":"Removing an XSLT parameter during processing could have lead to an exploitable use-after-free. 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 XSLT parameter processing. An attacker who gets a user to load a crafted page can run arbitrary code in the browser.","severity":"high","cvss":8.8,"epss":0.14261,"exploited":true,"exploited_at":"2022-03-07T00:00:00+00:00","products":[{"name":"Mozilla Firefox","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["browser","desktop","exploited","firefox","package"],"not_affected_if":["unknown"],"how_to_check":"Open Help > About Firefox and compare the version to the fixed release in Mozilla's advisory; unknown whether the sources list a specific version.","fix":"Update Firefox to the latest release per Mozilla's advisory; the exact fixed version is unknown from these sources.","status":"open","published_at":"2022-03-07T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:22:19+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-23T21:22:19Z","model":"claude-haiku-5-5","output":{"fix":"Update Firefox to the latest release per Mozilla's advisory; the exact fixed version is unknown from these sources.","reach":"internet","impact":"high","summary":"Mozilla Firefox has a use-after-free bug in its XSLT parameter processing. An attacker who gets a user to load a crafted page can run arbitrary code in the browser.","category":"package","who_cares":["firefox","desktop","browser"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker runs arbitrary code in the victim's browser session","analyst_note":"Confirm the fixed Firefox version and affected range from Mozilla's advisory for CVE-2022-26485; the sources give neither.","how_to_check":"Open Help > About Firefox and compare the version to the fixed release in Mozilla's advisory; unknown whether the sources list a specific version.","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000462,"input_tokens":2830,"output_tokens":357,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2022':11A,14A '-26485':12A,15A '91.6.1':90C '91.6.2':96C '97.0.2':87C '97.3.0':94C,99C 'abus':80C 'affect':85C 'android':93C 'arbitrari':50B 'attack':38B,76C 'browser':18B,54B 'bug':31B 'code':51B 'could':61C 'craft':46B 'cve':10A,13A 'desktop':19B 'esr':89C 'exploit':20B,66C 'firefox':2A,4A,17A,21B,24B,86C,88C,91C 'flaw':82C 'focus':98C 'free':8A,30B,70C 'get':40B 'lead':63C 'load':44B 'mozilla':1A,3A,16A,23B 'packag':22B 'page':47B 'paramet':35B,58C 'process':36B,60C 'remov':55C 'report':74C 'run':49B 'thunderbird':95C 'use':6A,28B,68C 'use-after-fre':5A,27B,67C 'user':42B 'vulner':9A,84C 'wild':79C 'xslt':34B,57C","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:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2022-26485","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-26485","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":"2026-10-25T12:39:24+00:00","note":null},{"source":"epss","external_id":"CVE-2022-26485","url":"https://api.first.org/data/v1/epss?cve=CVE-2022-26485","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-2022-26485","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-26485","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"}