CVE-2026-31802: node-tar Symlink Path Traversal via Drive-Relative Linkpath
CSIRTS triage
- What
- The node-tar module allows symlink path traversal via drive-relative linkpaths during archive extraction.
- Who is affected
- Applications using node-tar to extract archives from untrusted sources.
- Urgency
- Medium priority; attackers can extract files outside the intended directory.
- Action
- Update node-tar to a version that validates symlink targets and rejects drive-relative paths.
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-2026-31802
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-2026-318020.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-31802 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
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