CVE-2026-49248Network attack vector

Authenticated RCE via absolute TAR symlink targets

Published Jun 18, 2026 · Updated Jun 18, 2026

Symlink following in OneDev 15.0.6 and earlier allows remote authenticated users to write arbitrary server files through CI job archives. TarUtils.untar() creates each symbolic link from the TAR entry's getLinkName() value without rejecting an absolute target, then follows that link when extracting a later file. CI Job write access is sufficient and requires no administrator interaction; overwriting executable or configuration files grants server-side code execution.

CVSS severity8.3
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Symlink following in OneDev 15.0.6 and earlier allows remote authenticated users to write arbitrary server files through CI job archives. TarUtils.untar() creates each symbolic link from the TAR entry's getLinkName() value without rejecting an absolute target, then follows that link when extracting a later file. CI Job write access is sufficient and requires no administrator interaction; overwriting executable or configuration files grants server-side code execution.

The record

CVE
CVE-2026-49248
Published
Jun 18, 2026
Updated
Jun 18, 2026
Vendor
OneDev Pty
Product
OneDev
Classifications
CWE-61, CAPEC-27, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 15.0.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OneDev Pty · OneDevversion=< 15.0.7

Published CVSS scores

8.3GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-61UNIX Symbolic Link (Symlink) Following
CAPEC-27Leveraging Race Conditions via Symbolic Links
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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