CVE-2026-11853

Controlled Path Traversal Allowing Symbolic Link Creation in Debusine Package Parser

Published Jun 10, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
Debusine is an integrated solution to build, distribute and maintain a Debian-based distribution. Debian source packages (.dsc) and upload artifacts (.changes) are manifest files that name the files that make up the artifact. The parser used to read these files in Debusine accepted arbitrary fully user-controlled paths. The mergeuploads task could be abused to create arbitrary symbolic links on a worker, overwriting any file that the worker user has access to.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Controlled Path Traversal Allowing Symbolic Link Creation in Debusine Package Parser
Type Values Removed Values Added
Title Debusine Arbitrary Symbolic Link Creation Allows File Overwrite
Weaknesses CWE-22
Type Values Removed Values Added
Weaknesses CWE-59
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Debian
Debian debusine
Vendors & Products Debian
Debian debusine
Type Values Removed Values Added
Title Debusine Arbitrary Symbolic Link Creation Allows File Overwrite
Weaknesses CWE-22
Type Values Removed Values Added
Description Debusine is an integrated solution to build, distribute and maintain a Debian-based distribution. Debian source packages (.dsc) and upload artifacts (.changes) are manifest files that name the files that make up the artifact. The parser used to read these files in Debusine accepted arbitrary fully user-controlled paths. The mergeuploads task could be abused to create arbitrary symbolic links on a worker, overwriting any file that the worker user has access to.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
debian
Published
Updated
Jun 10, 2026, 6:50 PM
Reserved
Jun 10, 2026, 8:25 AM
Status
Deferred
Published
Jun 10, 2026, 10:16 AM
Modified
Oct 26, 2026, 11:10 AM