{"cve":{"cve_id":"CVE-2026-11940","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"description":"tarfile.extractall() with the 'data' or 'tar'\n filter could be bypassed by a crafted archive where a hardlink \nreferences a symlink stored at a deeper name than the hardlink itself.  \nThe extraction fallback validated the symlink at it's archived location \nbut recreated it at the hardlink's shallower\npath, letting a relative\n target the filter judged contained escape the destination directory.  \nThis allowed a malicious tar archive to create a symlink pointing \noutside the destination, enabling out-of-destination file reads or \nwrites. This was an incomplete fix of CVE-2025-4330.","published_at":"2026-06-23T16:04:17.321000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":7.8,"cvss_v4_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","cvss_v4_severity":"HIGH","ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-22","CWE-59"],"nvd_references":["https://github.com/python/cpython/pull/151559","https://mail.python.org/archives/list/security-announce@python.org/thread/LD6QIISNQFQYOIEPJNEUIPV7S3V76FZH/","https://github.com/python/cpython/issues/151558","https://github.com/python/cpython/commit/27dd970bf6b17ebca7c8ed486a40ab043ed7af8f","https://github.com/python/cpython/commit/672825e2f36a57e173959b0d9d409d4560dab8df","https://github.com/python/cpython/commit/771d12dda5140313db0ac550292987975651bbde","https://github.com/python/cpython/commit/79c06bd5c6afa3c440d50faf7ee1b147c8832b4c"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:50:40.391234Z","updated_at":"2026-06-28T23:28:55.783287Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":"4.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"AT","name":"Attack Requirements","value":"N","value_label":"None"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"VC","name":"Confidentiality (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VI","name":"Integrity (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VA","name":"Availability (Vulnerable System)","value":"N","value_label":"None"},{"metric":"SC","name":"Confidentiality (Subsequent System)","value":"H","value_label":"High"},{"metric":"SI","name":"Integrity (Subsequent System)","value":"H","value_label":"High"},{"metric":"SA","name":"Availability (Subsequent System)","value":"N","value_label":"None"}]},"affected":[{"vendor_slug":"python-software-foundation","vendor_name":"Python Software Foundation","product_slug":"cpython","product_name":"CPython","version_start":"0","version_start_inclusive":true,"version_end":"3.15.0","version_end_inclusive":false,"cpe23_uri":"cve5:python-software-foundation:cpython:0:3.15.0"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/python/cpython/pull/151559","source_type":"PATCH","tags":["patch"]},{"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/LD6QIISNQFQYOIEPJNEUIPV7S3V76FZH/","source_type":"MISC","tags":[]},{"url":"https://github.com/python/cpython/issues/151558","source_type":"MISC","tags":[]},{"url":"https://github.com/python/cpython/commit/27dd970bf6b17ebca7c8ed486a40ab043ed7af8f","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/python/cpython/commit/672825e2f36a57e173959b0d9d409d4560dab8df","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/python/cpython/commit/771d12dda5140313db0ac550292987975651bbde","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/python/cpython/commit/79c06bd5c6afa3c440d50faf7ee1b147c8832b4c","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-06-23T16:04:17.321000Z","label":"CVE published","source":null}]}