CVE-2026-55828
Medium
Description
qbee transport is a remote access transport protocol implementation. Prior to 1.26.25, the extractTar routine uses strictly lexical path validation that does not account for on-disk symlinks created earlier in the extraction process. A crafted tar archive can use a symlink chain to write or overwrite files one directory level above the intended extraction path. When qbee-agent performs the extraction with root privileges, this permits a root-privileged file write outside the intended destination. This issue is fixed in version 1.26.25.
SeverityMedium
CVSS6.0
Exploit probability—
ProductGo.qbee.io/transport
PublishedSep 15, 2026
First seenSep 15, 2026
Weakness typeCWE-22Path traversalCWE-59Improper link resolution
How to fix
Update
- go.qbee.io/transport1.26.25 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| go.qbee.io/transportGo | v < 1.26.25 | 1.26.25 |
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