Security Advisory

CVE-2026-49248

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-06-18 19:54:01

Last updated 2026-06-22 14:41:03

Assigner GitHub_M

CVSS score 8.3

State PUBLISHED

Description

OneDev is a Git server with CI/CD, kanban, and packages. In versions 15.0.6 and below, TarUtils.untar() creates symbolic links verbatim from TAR entry getLinkName() without validating whether the target is an absolute path. A subsequent file entry in the same archive traverses the symlink, writing to arbitrary server-side locations. This is exploitable by any authenticated user with CI Job write access — no admin interaction required. This is an incomplete fix bypass of CVE-2021-21251 (GHSA-2w6j-wc8c-9mq2): that patch blocked .. path segments but did not address absolute symlink targets. This issue has been fixed in version 15.0.7.

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