CVE-2026-49248 Details
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.
A vulnerability in OneDev Git server versions through 15.0.6 allows authenticated users with CI Job write access to overwrite arbitrary server files, potentially leading to remote code execution. This issue arises because the TarUtils.untar() method creates symbolic links from TAR entries without validating whether the targets are absolute paths. Subsequent file entries can traverse these symlinks, writing to unintended server locations. This vulnerability is an incomplete fix bypass of CVE-2021-21251, which failed to address absolute symlink targets. The issue has been patched in OneDev version 15.0.7.
Users can upgrade to OneDev version 15.0.7 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 18, 2026CISA-ADP
Assessed Jun 22, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/theonedev/onedev/commit/4f8684acebc4bfeefd3c7e23a34a4fd591cb27ad | [email protected] | Source CodeVendor |
| https://github.com/theonedev/onedev/security/advisories/GHSA-55g8-94r5-cj37 | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-61 | UNIX Symbolic Link (Symlink) Following | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| OneDev | <= 15.0.6 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 22, 2026 | CVE Modified | CISA-ADP |
| Jun 18, 2026 | New CVE Received | [email protected] |