{"id":"CVE-2026-116736","kind":"vulnerability","aliases":["CVE-2026-116736"],"related":[],"title":"libpff: crafted PST file triggers heap out-of-bounds read","description":"Libpff through 20260926 contains a heap out-of-bounds read vulnerability in libpff_table_read_values_array because a 7c column definition's values_array_size is not checked against remaining buffer bytes. Attackers can supply a crafted PST, OST or PAB file to make applications read adjacent heap memory into record entry values or crash.","summary":"libpff, a library for reading Outlook PST, OST and PAB mail files, does not check a column size against the remaining buffer in libpff_table_read_values_array. A crafted mail file can make an application read adjacent heap memory into record values or crash.","severity":"medium","cvss":6.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["email-processing","forensics-tools","libpff","package","pst-parsing"],"not_affected_if":["no-pst-ost-pab-parsing"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-10-26T22:16:57+00:00","first_seen_at":"2026-10-26T22:25:34+00:00","triaged_at":"2026-10-26T22:27:46+00:00","updated_at":"2026-10-26T22:27:46+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-26T22:27:46Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"libpff: crafted PST file triggers heap out-of-bounds read","impact":"low","summary":"libpff, a library for reading Outlook PST, OST and PAB mail files, does not check a column size against the remaining buffer in libpff_table_read_values_array. A crafted mail file can make an application read adjacent heap memory into record values or crash.","category":"package","nicknames":[],"who_cares":["libpff","pst-parsing","forensics-tools","email-processing"],"confidence":0.6,"needs_auth":"no","worst_case":"heap memory leaks into parsed values, or the reading process crashes","analyst_note":"Find the fixed libpff release and whether any downstream tool bundles it; the NVD entry alone gives no version or fix.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["no-pst-ost-pab-parsing"],"who_is_affected":"unknown","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000518,"input_tokens":3335,"output_tokens":368,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-116736':14A,17A '-2026':13A,16A '20260926':76C '7c':94C 'adjac':66B,122C 'applic':64B,120C 'array':56B,91C,99C 'attack':108C 'bound':10A,83C 'buffer':50B,106C 'byte':107C 'check':43B,103C 'column':45B,95C 'contain':77C 'craft':2A,58B,112C 'crash':73B,130C 'cve':12A,15A 'definit':96C 'email':19B 'email-process':18B 'entri':127C 'file':4A,40B,60B,117C 'forens':22B 'forensics-tool':21B 'heap':6A,67B,79C,123C 'libpff':1A,24B,29B,52B,74C,87C 'librari':31B 'mail':39B,59B 'make':62B,119C 'memori':68B,124C 'ost':36B,114C 'out-of-bound':7A,80C 'outlook':34B 'pab':38B,116C 'packag':25B 'pars':28B 'process':20B 'pst':3A,27B,35B,113C 'pst-pars':26B 'read':11A,33B,54B,65B,84C,89C,121C 'record':70B,126C 'remain':49B,105C 'size':46B,100C 'suppli':110C 'tabl':53B,88C 'tool':23B 'trigger':5A 'valu':55B,71B,90C,98C,128C 'vulner':85C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-26T22:16:57+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/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-2026-116736","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116736","severity":null,"published_at":"2026-10-26T22:16:57+00:00","modified_at":"2026-10-26T22:16:57+00:00","first_seen_at":"2026-10-26T22:25:34+00:00","fetched_at":"2026-10-26T22:25:34+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"}