CVE-2026-7774: tarfile.data_filter path traversal bypass allows writing outside the extraction directory
CSIRTS triage
- What
- A path traversal bypass allows writing outside the extraction directory.
- Who is affected
- Deployments using the tarfile library.
- Urgency
- Remediation is necessary as this could lead to unauthorized file access.
- Action
- Update to a patched version of the tarfile library.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-7774
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-77740.62% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 46% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-7774 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- medium[UPDATE] [medium] CPython: Vulnerability allows file manipulationcert-bund
- unknownUSN-8509-1: Python vulnerabilitiesubuntu
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