{"id":"CVE-2026-11972","title":"When using the \"tarfile\" module with a file opened in \"streaming mode\" (mode=\"r|\") the tarfile module did not properly handle EOF, making archive parsing take exponentially longer.","summary":"When using the \"tarfile\" module with a file opened in \"streaming mode\" (mode=\"r|\") the tarfile module did not properly handle EOF, making archive parsing take exponentially longer.","severity":"medium","cwe":["CWE-252","CWE-606","CWE-770","CWE-835"],"published":"2026-06-23","updated":"2026-08-06","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-11972","references":[{"url":"https://github.com/python/cpython/commit/3f031d431f80668e14f3bc066bbf4369cd9281b9","label":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/4ce6bf7c8aa7725828a38981c306f214c1f29365","label":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/7f0dc59c9a70f8f3b4da33d7c4a2ba552a7acc21","label":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/e86666c9dd256d52d0fbef6feb1ea4a51768fdec","label":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/eb63c0f94dfcbea7fda8eab6213818e134d67192","label":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/f50bf13566189c8d0ce5a814f33eff3d89951896","label":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/f5e2776ff0383a902c12acf2b703e7e951fc8438","label":"cna@python.org"},{"url":"https://github.com/python/cpython/issues/151981","label":"cna@python.org"},{"url":"https://github.com/python/cpython/pull/151982","label":"cna@python.org"},{"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/AXPSKKTSRKXTTJULW3XSIC74WZNAAPPB/","label":"cna@python.org"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-11972.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-11972"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492050"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-11972"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11972"},{"url":"https://access.redhat.com/errata/RHSA-2026:54534"},{"url":"https://access.redhat.com/errata/RHSA-2026:35807"},{"url":"https://access.redhat.com/errata/RHSA-2026:35813"},{"url":"https://access.redhat.com/errata/RHSA-2026:35812"},{"url":"https://access.redhat.com/errata/RHSA-2026:54554"},{"url":"https://access.redhat.com/errata/RHSA-2026:35806"}],"tags":["nvd","csaf","vex","red-hat"],"epss":0.00715,"epssPercentile":0.53549,"ingestedAt":"2026-08-06T20:03:56.259Z","vendor":"Red Hat","product":"Red Hat Hardened Images","affected":["exploit_intelligence","ai_inference_server","enterprise_linux 10","enterprise_linux 6","enterprise_linux 7","enterprise_linux 8","enterprise_linux 9","enterprise_linux_ai_rhel_ai 3","openshift_ai_rhoai","openshift_dev_spaces","openshift_virtualization 4","self_service_automation_portal 2","hardened_images"],"patched":["hardened_images"],"cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cvssSource":"vendor","slug":"CVE-2026-11972","body":"## Overview\n\nWhen using the \"tarfile\" module with a file opened in \"streaming mode\" (mode=\"r|\") the tarfile module did not properly handle EOF, making archive parsing take exponentially longer.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:54534** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-08-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:54534)\n- **RHSA-2026:35807** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-07-05 · [advisory](https://access.redhat.com/errata/RHSA-2026:35807)\n- **RHSA-2026:35813** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-07-05 · [advisory](https://access.redhat.com/errata/RHSA-2026:35813)\n- **RHSA-2026:35812** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-07-05 · [advisory](https://access.redhat.com/errata/RHSA-2026:35812)\n- **RHSA-2026:54554** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-08-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:54554)\n- **RHSA-2026:35806** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-07-05 · [advisory](https://access.redhat.com/errata/RHSA-2026:35806)\n- **Red Hat VEX** · Moderate · affected: Exploit Intelligence, Red Hat AI Inference Server, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · no fix planned: Exploit Intelligence, Red Hat AI Inference Server, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, … · updated 2026-10-09 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-11972.json)","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":218793,"id":"CVE-2026-11972","ts":1791620530959,"field":"cvss","old":null,"new":"6.5"},{"seq":218792,"id":"CVE-2026-11972","ts":1791620530959,"field":"severity","old":"none","new":"medium"}]}