{"id":"CVE-2026-117985","kind":"vulnerability","aliases":["CVE-2026-117985"],"related":[],"title":"Firefox: use-after-free in Graphics lets web content escape the sandbox","description":"Sandbox escape due to use-after-free in the Graphics component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.","summary":"A use-after-free bug in Firefox's Graphics component allows a crafted page to escape the browser sandbox. An attacker who lures a user to a malicious page could gain code execution outside the sandboxed content process.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","desktop","firefox","firefox-esr","package"],"not_affected_if":["no-desktop-browser","patched-version"],"how_to_check":"- Run `firefox --version` (or check Help > About Firefox) and compare against `159` for Firefox or `153.6` for Firefox ESR\n- Check the version managed by your fleet tool or package manager on each desktop image","fix":"- Update Firefox to `159` or later\n- Update Firefox ESR to `153.6` or later","status":"open","published_at":"2026-10-27T14:16:56+00:00","first_seen_at":"2026-10-27T14:32:24+00:00","triaged_at":"2026-10-27T14:35:03+00:00","updated_at":"2026-10-27T14:35:03+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-27T14:35:03Z","model":"claude-haiku-5-5","output":{"fix":"- Update Firefox to `159` or later\n- Update Firefox ESR to `153.6` or later","reach":"internet","title":"Firefox: use-after-free in Graphics lets web content escape the sandbox","impact":"high","summary":"A use-after-free bug in Firefox's Graphics component allows a crafted page to escape the browser sandbox. An attacker who lures a user to a malicious page could gain code execution outside the sandboxed content process.","category":"package","nicknames":[],"who_cares":["firefox","firefox-esr","desktop","browser"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker code runs outside the browser sandbox on the user's machine","analyst_note":"Check Mozilla's Firefox 159 and ESR 153.6 release notes for the advisory text and whether the bug is exploited in the wild; the source only gives a one-line description.","how_to_check":"- Run `firefox --version` (or check Help > About Firefox) and compare against `159` for Firefox or `153.6` for Firefox ESR\n- Check the version managed by your fleet tool or package manager on each desktop image","needs_analyst":true,"not_affected_if":["patched-version","no-desktop-browser"],"who_is_affected":"Anyone running desktop Firefox or Firefox ESR on a version older than 159 or 153.6 is exposed when browsing untrusted pages. Servers and managed environments without a browser are not affected. Teams with a fixed browser version pinned by policy can skip it once that version is confirmed as patched.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000609,"input_tokens":3246,"output_tokens":569,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-117985':16A,19A '-2026':15A,18A '153.6':88C '159':84C 'allow':38B 'attack':48B 'browser':20B,45B 'bug':32B 'code':59B 'compon':37B,77C 'content':10A,64B 'could':57B 'craft':40B 'cve':14A,17A 'desktop':21B 'due':68C 'escap':11A,43B,67C 'esr':25B,87C 'execut':60B 'firefox':1A,22B,24B,34B,83C,86C 'firefox-esr':23B 'fix':81C 'free':5A,31B,73C 'gain':58B 'graphic':7A,36B,76C 'let':8A 'lure':50B 'malici':55B 'outsid':61B 'packag':26B 'page':41B,56B 'process':65B 'sandbox':13A,46B,63B,66C 'use':3A,29B,71C 'use-after-fre':2A,28B,70C 'user':52B 'vulner':79C 'web':9A","nicknames":[],"mitigations":[],"who_affected":"Anyone running desktop Firefox or Firefox ESR on a version older than 159 or 153.6 is exposed when browsing untrusted pages. Servers and managed environments without a browser are not affected. Teams with a fixed browser version pinned by policy can skip it once that version is confirmed as patched.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T14:16:56+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-117985","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-117985","severity":null,"published_at":"2026-10-27T14:16:56+00:00","modified_at":"2026-10-27T14:16:56+00:00","first_seen_at":"2026-10-27T14:32:24+00:00","fetched_at":"2026-10-27T14:32:24+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"}