{"id":"CVE-2026-116729","kind":"vulnerability","aliases":["CVE-2026-116729"],"related":[],"title":"libfvde: crafted FileVault 2 volume causes heap out-of-bounds read","description":"libfvde through 20260923 contains a heap out-of-bounds read vulnerability in libfvde_encrypted_metadata_read_type_0x001a() caused by an unbounded strlen on embedded XML plist data. Attackers can supply a crafted FileVault 2 volume with non-NUL-terminated plist data, causing libfvde_volume_open() to read past the heap block buffer.","summary":"libfvde, a library for reading FileVault 2 encrypted volumes, has a heap out-of-bounds read when parsing embedded plist metadata. A crafted encrypted volume can make the parser read past a heap buffer, which can leak memory contents or crash the process.","severity":"medium","cvss":4.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["disk-images","filevault","forensics","libfvde","package"],"not_affected_if":["no-untrusted-volumes"],"how_to_check":"- unknown","fix":"- unknown","status":"open","published_at":"2026-10-26T22:16:56+00:00","first_seen_at":"2026-10-26T22:25:33+00:00","triaged_at":"2026-10-26T22:28:06+00:00","updated_at":"2026-10-26T22:28:06+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-26T22:28:06Z","model":"claude-haiku-5-5","output":{"fix":"- unknown","reach":"local","title":"libfvde: crafted FileVault 2 volume causes heap out-of-bounds read","impact":"low","summary":"libfvde, a library for reading FileVault 2 encrypted volumes, has a heap out-of-bounds read when parsing embedded plist metadata. A crafted encrypted volume can make the parser read past a heap buffer, which can leak memory contents or crash the process.","category":"package","nicknames":[],"who_cares":["libfvde","forensics","disk-images","filevault"],"confidence":0.6,"needs_auth":"no","worst_case":"process crash or leaked heap memory from parsing a crafted volume","analyst_note":"Confirm the fixed libfvde version and whether a patched release exists, using the NVD entry and the upstream libfvde project.","how_to_check":"- unknown","needs_analyst":true,"not_affected_if":["no-untrusted-volumes"],"who_is_affected":"Teams that open FileVault 2 volumes with libfvde, for example forensics or disk-image tooling, are exposed when they process volumes from untrusted sources. Applications that never parse untrusted FileVault 2 images can skip it. unknown whether any specific release is fixed.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000566,"input_tokens":3340,"output_tokens":464,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-116729':15A,18A '-2026':14A,17A '0x001a':88C '2':4A,32B,105C '20260923':72C 'attack':99C 'block':123C 'bound':11A,41B,79C 'buffer':60B,124C 'caus':6A,89C,114C 'contain':73C 'content':65B 'craft':2A,49B,103C 'crash':67B 'cve':13A,16A 'data':98C,113C 'disk':20B 'disk-imag':19B 'embed':45B,95C 'encrypt':33B,50B,84C 'filevault':3A,22B,31B,104C 'forens':23B 'heap':7A,37B,59B,75C,122C 'imag':21B 'leak':63B 'libfvd':1A,24B,26B,70C,83C,115C 'librari':28B 'make':53B 'memori':64B 'metadata':47B,85C 'non':109C 'non-nul-termin':108C 'nul':110C 'open':117C 'out-of-bound':8A,38B,76C 'packag':25B 'pars':44B 'parser':55B 'past':57B,120C 'plist':46B,97C,112C 'process':69B 'read':12A,30B,42B,56B,80C,86C,119C 'strlen':93C 'suppli':101C 'termin':111C 'type':87C 'unbound':92C 'volum':5A,34B,51B,106C,116C 'vulner':81C 'xml':96C","nicknames":[],"mitigations":[],"who_affected":"Teams that open FileVault 2 volumes with libfvde, for example forensics or disk-image tooling, are exposed when they process volumes from untrusted sources. Applications that never parse untrusted FileVault 2 images can skip it. unknown whether any specific release is fixed.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-26T22:16:56+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-116729","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116729","severity":null,"published_at":"2026-10-26T22:16:56+00:00","modified_at":"2026-10-26T22:16:56+00:00","first_seen_at":"2026-10-26T22:25:33+00:00","fetched_at":"2026-10-26T22:25:33+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"}