{"id":"CVE-2026-116671","kind":"vulnerability","aliases":["CVE-2026-116671"],"related":[],"title":"Xpdf: crafted JPEG 2000 image makes PDF viewer hang forever","description":"Infinite loop in Xpdf 4.06 and earlier, due to incorrect validation of progression order field in JPEG 2000 image.","summary":"Xpdf 4.06 and earlier loop forever when parsing a JPEG 2000 image with a bad progression order field. An attacker who gets a user to open a crafted PDF can freeze the viewer or a service that renders PDFs.","severity":"low","cvss":2.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["package","pdf","self-hosted","xpdf"],"not_affected_if":["untrusted-pdfs-not-processed","xpdf-not-installed"],"how_to_check":"- Run `xpdf -v` or check the installed Xpdf version and compare it with `4.06`\n- Check whether your Linux distribution's `xpdf` package is listed in the advisory as affected: unknown","fix":"- Move to a fixed Xpdf release newer than `4.06`: unknown (the sources do not name the fixed version)\n- Until patched, avoid opening untrusted PDFs in Xpdf or any service that uses it for conversion: unknown","status":"open","published_at":"2026-10-26T21:18:17+00:00","first_seen_at":"2026-10-26T21:20:32+00:00","triaged_at":"2026-10-26T21:21:18+00:00","updated_at":"2026-10-26T21:21:18+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-26T21:21:18Z","model":"claude-haiku-5-5","output":{"fix":"- Move to a fixed Xpdf release newer than `4.06`: unknown (the sources do not name the fixed version)\n- Until patched, avoid opening untrusted PDFs in Xpdf or any service that uses it for conversion: unknown","reach":"unknown","title":"Xpdf: crafted JPEG 2000 image makes PDF viewer hang forever","impact":"low","summary":"Xpdf 4.06 and earlier loop forever when parsing a JPEG 2000 image with a bad progression order field. An attacker who gets a user to open a crafted PDF can freeze the viewer or a service that renders PDFs.","category":"package","nicknames":[],"who_cares":["xpdf","pdf","self-hosted"],"confidence":0.6,"needs_auth":"no","worst_case":"Viewer or conversion process hangs and consumes CPU indefinitely","analyst_note":"Confirm the fixed Xpdf version and whether distribution packages are affected, using the NVD entry linked in the sources.","how_to_check":"- Run `xpdf -v` or check the installed Xpdf version and compare it with `4.06`\n- Check whether your Linux distribution's `xpdf` package is listed in the advisory as affected: unknown","needs_analyst":true,"not_affected_if":["xpdf-not-installed","untrusted-pdfs-not-processed"],"who_is_affected":"Teams that run Xpdf 4.06 or earlier to view or convert PDFs, especially servers that process user-uploaded PDFs with embedded JPEG 2000 images. Systems that do not ship or run Xpdf, or that use a different PDF renderer, are not affected.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"low"},"cost_usd":0.000633,"input_tokens":3270,"output_tokens":612,"severity_before":"low"},"analyst_status":null,"analyst_note":null,"search":"'-116671':13A,16A '-2026':12A,15A '2000':4A,33B,79C '4.06':24B,66C 'attack':42B 'bad':37B 'craft':2A,50B 'cve':11A,14A 'due':69C 'earlier':26B,68C 'field':40B,76C 'forev':10A,28B 'freez':53B 'get':44B 'hang':9A 'host':21B 'imag':5A,34B,80C 'incorrect':71C 'infinit':62C 'jpeg':3A,32B,78C 'loop':27B,63C 'make':6A 'open':48B 'order':39B,75C 'packag':17B 'pars':30B 'pdf':7A,18B,51B 'pdfs':61B 'progress':38B,74C 'render':60B 'self':20B 'self-host':19B 'servic':58B 'user':46B 'valid':72C 'viewer':8A,55B 'xpdf':1A,22B,23B,65C","nicknames":[],"mitigations":[],"who_affected":"Teams that run Xpdf 4.06 or earlier to view or convert PDFs, especially servers that process user-uploaded PDFs with embedded JPEG 2000 images. Systems that do not ship or run Xpdf, or that use a different PDF renderer, are not affected.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-26T21:18:17+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/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":"xpdf@xpdfreader.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-116671","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116671","severity":null,"published_at":"2026-10-26T21:18:17+00:00","modified_at":"2026-10-26T21:18:17+00:00","first_seen_at":"2026-10-26T21:20:32+00:00","fetched_at":"2026-10-26T21:20:32+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"}