CVE-2026-82049
HighCVSS 8.4Exploitation Probability (EPSS)
Low risk8th percentile - higher than 8% of all known CVEs
Summary
In CPython 3.13 and earlier, the tarfile module's data and tar extraction filters are vulnerable to crafted archives containing a hard link to a symbolic link. Such archives may cause extraction to modify the permissions or modification time of a file outside the destination directory, or expose the contents of that file within the extracted tree.
Risk Assessment
An attacker could modify metadata or expose file contents outside the destination directory, potentially leading to a breach of data integrity or confidentiality.
Recommendation
Upgrade CPython to a version containing the fix or avoid extracting untrusted tar archives using the vulnerable filters.
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Original NVD description (English source)
In CPython 3.13 and earlier, the tarfile module's data and tar extraction filters are vulnerable to crafted archives containing a hard link to a symbolic link. Such archives may cause extraction to modify the permissions or modification time of a file outside the destination directory, or expose the contents of that file within the extracted tree.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

