Answer in brief
CVE-2026-55828 records a Medium severity (CVSS 6.0) vulnerability in qbee transport: Symlink-chain path traversal in tar extraction (one level outside destination). The current sources do not mark it as known exploited. The current feed maps qbee-io/transport (generic), go.qbee.io/transport (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps qbee-io/transport (generic), go.qbee.io/transport (go). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| qbee-io/transportgeneric | <1.26.25 | 1.26.25 |
| go.qbee.io/transportgo | <1.26.25 | 1.26.25 |
Published upstream
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
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.
Quoted source text, attributed separately from HOL analysis.