{"id":"CVE-2021-34141","aliases":["GHSA-fpfv-jqm9-f5jm","PYSEC-2021-855"],"url":"https://o3.security/vulnerability/CVE-2021-34141","summary":"Incorrect Comparison in NumPy","details":"An incomplete string comparison in the numpy.core component in NumPy before 1.22.0 allows attackers to trigger slightly incorrect copying by constructing specific string objects. NOTE: the vendor states that this reported code behavior is \"completely harmless.\"","published":"2021-12-17T19:15:07.543Z","modified":"2026-07-08T05:59:22.576731945Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"PyPI","name":"numpy","fixedVersion":"1.22"}],"fix":null,"references":[{"type":"FIX","url":"https://github.com/numpy/numpy/issues/18993"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpujul2022.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34141"},{"type":"WEB","url":"https://github.com/numpy/numpy/issues/18993#issuecomment-1010735102"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-fpfv-jqm9-f5jm"},{"type":"PACKAGE","url":"https://github.com/numpy/numpy"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/numpy/PYSEC-2021-855.yaml"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T05:59:22.576731945Z"}}