CVE-2026-7774
tarfile.data_filter path traversal bypass allows writing outside the extraction directory
Description
tarfile.data_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() to write files outside the destination directory, subject to the permissions of the extracting process.
How to fix CVE-2026-7774
No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.
- Bitnami/libpython—no fix listed
- Bitnami/python—no fix listed
- —no fix listed
- —no fix listed
- —no fix listed
- —no fix listed
- —no fix listed
- —no fix listed
- —no fix listed
Is CVE-2026-7774 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-7774.
Affected packages (9)
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CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |