{"id":"CVE-2026-58971","kind":"vulnerability","aliases":["CVE-2026-58971"],"related":[],"title":"MuPDF print driver: integer overflow allows out-of-bounds memory read","description":"In _mupdf_get_hdr of wprint_mupdf.c, there is a possible out-of-bounds read due to an integer overflow. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.","summary":"A bounds check in the _mupdf_get_hdr function of wprint_mupdf.c can be defeated by an integer overflow, causing an out-of-bounds read. An attacker with local access could read memory contents, which may disclose information.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["mupdf","other","pdf"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-02T20:17:53+00:00","first_seen_at":"2026-11-02T20:35:34+00:00","triaged_at":"2026-11-02T20:38:28+00:00","updated_at":"2026-11-02T20:38:28+00:00","category":"other","confidence":0.35,"triage":{"at":"2026-11-02T20:38:28Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"MuPDF print driver: integer overflow allows out-of-bounds memory read","impact":"low","summary":"A bounds check in the _mupdf_get_hdr function of wprint_mupdf.c can be defeated by an integer overflow, causing an out-of-bounds read. An attacker with local access could read memory contents, which may disclose information.","audience":"developers","category":"other","nicknames":[],"who_cares":["mupdf","pdf"],"confidence":0.35,"fix_status":"unknown","needs_auth":"no","worst_case":"local attacker reads out-of-bounds memory, leaking information","analyst_note":"Identify the affected product and versions from the NVD entry (https://nvd.nist.gov/vuln/detail/CVE-2026-58971) and whether a fix exists.","how_to_check":"unknown","plain_action":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown. The sources do not name the affected product or versions; the function is in a MuPDF-related print file, so teams building or embedding MuPDF-based printing should check whether they ship that code.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"low"},"cost_usd":0.000627,"input_tokens":4108,"output_tokens":432,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':14A,17A '-58971':15A,18A 'access':52B 'addit':91C 'allow':6A 'attack':49B 'bound':10A,23B,46B,75C 'caus':41B 'check':24B 'content':56B 'could':53B,83C 'cve':13A,16A 'defeat':36B 'disclos':59B 'disclosur':88C 'driver':3A 'due':77C 'execut':92C 'exploit':101C 'function':30B 'get':28B,63C 'hdr':29B,64C 'inform':60B,87C 'integ':4A,39B,80C 'interact':96C 'lead':84C 'local':51B,86C 'may':58B 'memori':11A,55B 'mupdf':1A,19B,27B,62C 'mupdf.c':33B,67C 'need':94C,99C 'out-of-bound':7A,43B,72C 'overflow':5A,40B,81C 'pdf':21B 'possibl':71C 'print':2A 'privileg':93C 'read':12A,47B,54B,76C 'user':95C 'wprint':32B,66C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["mupdf","other","pdf","unknown"],"first_public_at":"2026-11-02T20:17:53+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-58971","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58971","severity":null,"published_at":"2026-11-02T20:17:53+00:00","modified_at":"2026-11-02T20:17:53+00:00","first_seen_at":"2026-11-02T20:35:34+00:00","fetched_at":"2026-11-02T20:35:34+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"}