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{"bugzilla": {"description": "cpython: Tarfile extracts filtered members when errorlevel=0", "id": "2370010", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2370010"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.7", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N", "status": "draft"}, "cwe": "CWE-706", "details": ["When using a TarFile.errorlevel = 0\u00a0and extracting with a filter the documented behavior is that any filtered members would be skipped and not extracted. However the actual behavior of TarFile.errorlevel = 0\u00a0in affected versions is that the member would still be extracted and not skipped.", "A flaw was found in CPython's tarfile module. This vulnerability allows unauthorized file extraction via crafted tar archives when TarFile.errorlevel=0, bypassing expected filtering mechanisms."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2025-4435", "public_date": "2025-06-03T12:59:06Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-4435"], "statement": "The severity of this vulnerability was lowered due to the fact that successful exploitation requires the attacker to convince a privileged user or process to extract a malicious tar file. Since tar file extraction typically occurs in trusted contexts or with elevated privileges, the impact is reduced by the requirement of such access.", "threat_severity": "Moderate"}