{"id":"GHSA-rg2m-55pr-vp3q","kind":"vulnerability","aliases":["GHSA-rg2m-55pr-vp3q"],"related":[],"title":"CVE-2026-119083 - GluonTS arbitrary file write during archive extraction","description":"CVE-2026-119083 - GluonTS arbitrary file write during archive extraction\n\n### CVE-2026-119083 - GluonTS arbitrary file write during archive extraction\n\nBulletin ID: 2026-171-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 11/05/2026 08:30 AM PST\n\nDescription:\n\nGluonTS is an open-source Python library for probabilistic time series modeling.\n\nWe identified CVE-2026-119083, an issue in the archive extraction utility in GluonTS before 0.17.0. An actor who supplies a crafted tar archive containing symbolic or hard links might be able to write arbitrary files outside the intended extraction directory with the privileges of the extracting process.\n\nImpacted versions: < 0.17.0\n\nResolution:\n\nThis issue has been addressed in gluonts version 0.17.0. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.\n\nWorkarounds:\n\nIf you cannot upgrade immediately, do not use GluonTS to extract tar archives from untrusted or unverified sources. As defense in depth, running on Python 3.14 or later causes TarFile.extractall() to apply the data extraction filter by default, which blocks the link-based traversal described here. Upgrading to 0.17.0 remains the recommended remediation.\n\nReferences:\n\n- CVE-2026-119083\n- GHSA-rg2m-55pr-vp3q\n\nAcknowledgement:\n\nWe would like to thank Udit Jain for collaborating on this issue through the coordinated vulnerability disclosure process.\n\n Please email aws-security@amazon.com with any security questions or concerns.","summary":"GluonTS, a Python library for time series modeling, extracts tar archives in a way that follows symbolic and hard links. A crafted archive can make it write arbitrary files outside the intended directory, with the privileges of the extracting process.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["aws","gluonts","lab-disclosure","ml-pipelines","package","python"],"not_affected_if":["no-untrusted-archives","python-3.14-or-later"],"how_to_check":"- Check the installed version with `pip show gluonts`; versions below `0.17.0` are affected.\n- Search your code and pipelines for calls that extract tar archives with GluonTS, especially on archives from untrusted sources.","fix":"- GluonTS: upgrade to `0.17.0`.","status":"open","published_at":null,"first_seen_at":"2026-11-05T17:07:50+00:00","triaged_at":"2026-11-05T17:08:37+00:00","updated_at":"2026-11-05T17:08:37+00:00","category":"package","confidence":0.8,"triage":{"at":"2026-11-05T17:08:37Z","model":"claude-haiku-5-5","output":{"fix":"- GluonTS: upgrade to `0.17.0`.","reach":"unknown","title":"GluonTS: crafted tar archive writes files outside extraction directory","impact":"high","summary":"GluonTS, a Python library for time series modeling, extracts tar archives in a way that follows symbolic and hard links. A crafted archive can make it write arbitrary files outside the intended directory, with the privileges of the extracting process.","audience":"developers","category":"package","nicknames":[],"who_cares":["python","gluonts","ml-pipelines"],"confidence":0.8,"fix_status":"available","needs_auth":"unknown","worst_case":"Attacker writes arbitrary files as the extracting process user.","analyst_note":"","how_to_check":"- Check the installed version with `pip show gluonts`; versions below `0.17.0` are affected.\n- Search your code and pipelines for calls that extract tar archives with GluonTS, especially on archives from untrusted sources.","plain_action":"","needs_analyst":false,"not_affected_if":["no-untrusted-archives","python-3.14-or-later"],"who_is_affected":"Teams that use GluonTS to extract tar archives from sources they do not fully trust. Risk depends on whether the process running extraction has write access to sensitive paths. Teams that do not extract archives with GluonTS, or that run only on trusted data, are less exposed. Running on Python 3.14 or later applies the tar data extraction filter by default, which blocks this link-based traversal, according to the bulletin.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000756,"input_tokens":4740,"output_tokens":564,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-119083':3A,73C,83C,128C,264C '-171':94C '-2026':2A,72C,82C,127C,263C '0.17.0':139C,174C,184C,256C '08':106C '11/05/2026':105C '2026':93C '3.14':232C '30':107C '55pr':14A,19A,268C 'abl':155C 'acknowledg':270C 'actor':141C 'address':180C 'appli':238C 'arbitrari':5A,58B,75C,85C,158C 'archiv':9A,41B,53B,79C,89C,133C,147C,219C 'attent':102C 'aw':21B,95C,97C 'aws-security@amazon.com':291C 'base':250C 'block':246C 'bulletin':91C 'cannot':209C 'caus':235C 'code':198C 'collabor':279C 'concern':297C 'contain':148C 'content':98C 'coordin':285C 'craft':52B,145C 'cve':1A,71C,81C,126C,262C 'data':240C 'date':104C 'default':244C 'defens':226C 'depth':228C 'deriv':197C 'describ':252C 'descript':110C 'directori':63B,164C 'disclosur':25B,287C 'email':290C 'ensur':193C 'extract':10A,39B,69B,80C,90C,134C,163C,170C,217C,241C 'file':6A,59B,76C,86C,159C 'filter':242C 'fix':205C 'follow':46B 'fork':195C 'ghsa':12A,17A,266C 'ghsa-rg2m-55pr-vp3q':11A,16A,265C 'gluont':4A,22B,31B,74C,84C,111C,137C,182C,215C 'hard':49B,151C 'id':92C 'identifi':125C 'immedi':211C 'impact':172C 'import':100C 'incorpor':202C 'intend':62B,162C 'issu':130C,177C,282C 'jain':277C 'lab':24B 'lab-disclosur':23B 'later':234C 'latest':190C 'librari':34B,118C 'like':273C 'link':50B,152C,249C 'link-bas':248C 'make':55B 'might':153C 'ml':27B 'ml-pipelin':26B 'model':38B,123C 'new':204C 'open':115C 'open-sourc':114C 'outsid':60B,160C 'packag':29B 'patch':200C 'pipelin':28B 'pleas':289C 'privileg':66B,167C 'probabilist':120C 'process':70B,171C,288C 'pst':109C 'public':103C 'python':30B,33B,117C,231C 'question':295C 'recommend':186C,259C 'refer':261C 'remain':257C 'remedi':260C 'requir':101C 'resolut':175C 'rg2m':13A,18A,267C 'run':229C 'scope':96C 'secur':294C 'seri':37B,122C 'sourc':116C,224C 'suppli':143C 'symbol':47B,149C 'tar':40B,146C,218C 'tarfile.extractall':236C 'thank':275C 'time':36B,121C 'travers':251C 'type':99C 'udit':276C 'untrust':221C 'unverifi':223C 'upgrad':187C,210C,254C 'use':214C 'util':135C 'version':173C,183C,191C 'vp3q':15A,20A,269C 'vulner':286C 'way':44B 'workaround':206C 'would':272C 'write':7A,57B,77C,87C,157C","nicknames":[],"mitigations":[],"who_affected":"Teams that use GluonTS to extract tar archives from sources they do not fully trust. Risk depends on whether the process running extraction has write access to sensitive paths. Teams that do not extract archives with GluonTS, or that run only on trusted data, are less exposed. Running on Python 3.14 or later applies the tar data extraction filter by default, which blocks this link-based traversal, according to the bulletin.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["aws","gluonts","labdisclosure","mlpipelines","package","python","unknown"],"campaign_type":null,"first_public_at":null,"kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"lab","external_id":"https://aws.amazon.com/security/security-bulletins/rss/2026-171-aws/#GHSA-rg2m-55pr-vp3q","url":"https://aws.amazon.com/security/security-bulletins/rss/2026-171-aws/","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-11-05T17:07:50+00:00","fetched_at":"2026-11-05T17:07:50+00:00","note":"AWS: CVE-2026-119083 - GluonTS arbitrary file write during archive extraction"}],"documents":[{"id":77859,"url":"https://aws.amazon.com/security/security-bulletins/rss/2026-171-aws/","title":"AWS: CVE-2026-119083 - GluonTS arbitrary file write during archive extraction","kind":"advisory","source":"lab","publisher":"research","text":"CVE-2026-119083 - GluonTS arbitrary file write during archive extraction\n\n### CVE-2026-119083 - GluonTS arbitrary file write during archive extraction\n\nBulletin ID: 2026-171-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 11/05/2026 08:30 AM PST\n\nDescription:\n\nGluonTS is an open-source Python library for probabilistic time series modeling.\n\nWe identified CVE-2026-119083, an issue in the archive extraction utility in GluonTS before 0.17.0. An actor who supplies a crafted tar archive containing symbolic or hard links might be able to write arbitrary files outside the intended extraction directory with the privileges of the extracting process.\n\nImpacted versions: < 0.17.0\n\nResolution:\n\nThis issue has been addressed in gluonts version 0.17.0. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.\n\nWorkarounds:\n\nIf you cannot upgrade immediately, do not use GluonTS to extract tar archives from untrusted or unverified sources. As defense in depth, running on Python 3.14 or later causes TarFile.extractall() to apply the data extraction filter by default, which blocks the link-based traversal described here. Upgrading to 0.17.0 remains the recommended remediation.\n\nReferences:\n\n- CVE-2026-119083\n- GHSA-rg2m-55pr-vp3q\n\nAcknowledgement:\n\nWe would like to thank Udit Jain for collaborating on this issue through the coordinated vulnerability disclosure process.\n\n Please email aws-security@amazon.com with any security questions or concerns.","published_at":null,"relation":"advisory","confidence":null,"note":null}],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}