CVE-2026-55828
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.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 6
- CVSS vector
- 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
- EPSS probability
- 0.37%
- CWE
- CWE-22, CWE-59
- Published
- 2026-09-15
- Last modified
- 2026-09-15
Affected products
- qbee-io transport
Weakness type
Related vulnerabilities
- CVE-2026-85706 — Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in GitLab
- CVE-2026-78657 — SigmaForms Pro <= 1.4.11 - Unauthenticated Arbitrary File Deletion via Path Traversal in File Upload Field
- CVE-2026-61560 — @zereight/mcp-gitlab's unauthenticated arbitrary file read via `upload_markdown` enables PAT exfiltration and full account takeover
- CVE-2026-82100 — DataStage on Cloud Pak for Data has several vulnerabilities due to open source software
- CVE-2026-82954 — Dokploy Settings application.ts writeTraefikConfigInPath path traversal
- CVE-2026-85661 — excel-mcp-server 0.1.8 Arbitrary File Read/Write via stdio mode
- CVE-2026-89040 — Tencent Mass Service Engine in Cluster (MSEC) path traversal
- CVE-2026-88069 — Path traversal in Pandora archive extractor allows arbitrary file writes outside the extraction directory in pandora analysis