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CVE-2026-49248

HIGH
8.3
CVSS 4.0
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.

Metadata

CVE ID
CVE-2026-49248
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-05-28 14:33 UTC
Published
2026-06-18 19:54 UTC
Last updated
2026-06-18 19:54 UTC
Primary CWE
CWE-61
CWE-61: UNIX Symbolic Link (Symlink) Following
Vendor / Product
theonedev / onedev
Sources
cve.org  ·  NVD

Severity & Metrics

8.3 HIGH CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
Affected products (1)
VendorProductPlatformVersions
theonedev onedev — < 15.0.7
Weakness (CWE)
CWESourceDescription
CWE-61 cna CWE-61: UNIX Symbolic Link (Symlink) Following
CVSS scores (1)
ScoreSeverityVersionSourceVector
8.3 HIGH 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
References (2)
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