Medium 6.0Published Sep 15, 2026

CVE-2026-55828qbee transport: Symlink-chain path traversal in tar extraction (one level outside destination)

Updated under an hour ago (2026-10-19 08:50 UTC)

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It affects qbee-io transport. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for qbee-io transport

Exploited in the last 30 days

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.

CVSS: 6.0 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
Weakness (CWE): CWE-22, CWE-59
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

qbee-io transport qbee_io:transport (from the name)	before 1.26.25	CNA record

References

https://github.com/qbee-io/transport/security/advisories/GHSA-f9m7-vc86-p6jjx-refsource-confirm
https://github.com/qbee-io/transport/pull/19x-refsource-misc
https://github.com/qbee-io/transport/commit/43947671ba9be8fb08b105f3539a112ee7a57ddcx-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.